All Tools

Calculate screen width and height from diagonal size and aspect ratio. Convert between inches and centimeters for displays, TVs, and monitors with instant dimension calculations.

Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.

Convert between international paper sizes (A4, Letter, Legal) with dimensions in mm, cm, and inches. Compare ISO A/B series and North American paper standards.

Convert between MPG (miles per gallon), L/100km (liters per 100 kilometers), and other fuel efficiency units. Compare car fuel economy across different measurement systems.

Split large CSV files into smaller files by number of rows. Process large datasets in manageable chunks instantly.

Generate JSON-LD Product schema markup for SEO. Add product details like name, price, brand, rating, and availability to create structured data for rich search results.

View and search large text files up to 200MB in your browser. Features virtual scrolling, line numbers, search functionality, and file statistics. Perfect for log files, CSV, JSON, and code files.

Generate secure, cryptographically random API keys for authentication and authorization. Create custom API keys with various formats including hex, base64, and prefixed keys.

Convert clothing sizes between US, UK, EU, and international sizing systems. Find equivalent sizes for men's, women's, and kids' clothing with body measurements.

Convert seconds to HH:MM:SS time format instantly with precise calculations and easy-to-read formatting.

Convert hours to minutes instantly. Simple, accurate time conversion calculator for work hours, schedules, and time management.

Count down to special events and important dates. Perfect for weddings, birthdays, vacations, project deadlines, and celebrations with live time tracking.

Generate simple placeholder logos with monograms, shapes, and preset color palettes. Perfect for mockups, prototypes, and early-stage branding.

Parse HTTP cookie strings into readable key-value pairs. Decode URL-encoded values and inspect cookies from browser requests.

Generate secure RSA public/private key pairs for encryption, digital signatures, and authentication. Create 1024 to 4096-bit RSA keys instantly in your browser.

Calculate aspect ratios, find missing dimensions, and convert between different aspect ratios for videos, images, and screens. Supports 16:9, 4:3, 21:9, and more.

Generate secure numeric PINs for devices, accounts, and security systems. Create random PINs with strength analysis and security recommendations.

Parse URL query strings into readable key-value pairs. Decode parameters and inspect URL search queries with ease.

Generate random fake names for testing and development purposes.

Calculate the duration between two dates and times. Get results in days, hours, minutes, and seconds.

Obfuscate JavaScript code to protect your intellectual property. Encode strings, rename variables, inject dead code, and add debug protection to make reverse engineering more difficult.

Boost productivity with the Pomodoro Technique: work in focused 25-minute intervals with short breaks. Perfect for studying, coding, writing, and focused work.

Merge Excel sheets - Combine multiple Excel files into a single workbook with all sheets preserved

Create beautiful Markdown tables visually with a spreadsheet-like editor. Set headers, adjust column alignment, and see live preview. Perfect for GitHub READMEs, documentation, and wikis.

Convert ring sizes between US, UK, and EU sizing systems. Find equivalent sizes using diameter or circumference measurements for accurate ring fitting.

Parse user agent strings to extract browser, operating system, device, and engine information. Essential for web analytics, device detection, and browser compatibility testing.

Decode JWT (JSON Web Token) headers and payloads locally in your browser. View claims, algorithm info, and signature without sending data to any server.

Generate professional AI-powered replies to messages with customizable tone and style. Perfect for emails, chats, and messages.

Format and beautify Python code following PEP 8 style guidelines with proper indentation, spacing, and line breaks. Perfect for cleaning up messy code or enforcing consistent style.

Generate random dictionary words for creative writing, brainstorming, games, and password creation.

Generate random grammatically correct sentences for creative writing, testing, and content creation.

Generate random dates within custom ranges with multiple format options.

Validate CSV format - Check CSV files for errors, inconsistent columns, empty values, and formatting issues

Calculate your Body Mass Index and health category

Generate professional ad creatives instantly with AI. Create 5 compelling captions, 3 short descriptions, catchy punchlines, and powerful CTAs. Choose from punchy, emotional, clever, or salesy styles. Perfect for social media ads, marketing campaigns, and advertising copy.

Predict child adult height based on parent heights using the Mid-Parental Height method. Calculate how tall your child will be with genetic predictions.

Write and preview Markdown with live rendering

Convert milliseconds to seconds, minutes, hours, days, and weeks with precise calculations and instant results.

Delete specific pages from a PDF. Upload your PDF, preview all pages as thumbnails, mark unwanted pages for deletion, and save the cleaned PDF. Fast, visual, and privacy-focused.

Count words, characters, sentences, and reading time instantly

Convert PNG, JPG, and WEBP images to next-generation AVIF format with superior compression and quality. AVIF provides better compression than WEBP while maintaining excellent image quality. Perfect for modern web applications. All conversions run locally in your browser - files never leave your device.

Find out what day of the week any date falls on - past, present, or future dates instantly.

Format and beautify API responses for better readability. JSON formatter with minify and prettify options.

Build UTM tracking parameters for marketing campaigns. Generate tracked URLs with campaign source, medium, campaign name, term, and content parameters.

Compress files to ZIP - Create ZIP archives from multiple files with customizable compression settings

Convert minutes to hours instantly. Get results in both decimal hours and hours:minutes format. Perfect for time tracking, payroll, and scheduling.

Generate random numbers with customizable range, quantity, and format options instantly.

Generate UUID v4 (Universally Unique Identifiers) for databases, APIs, and distributed systems. Create single or batch UUIDs with one click.

Minify and compress CSS code to reduce file size for production. Remove comments, whitespace, and optimize styles for faster loading.

Minify and compress HTML code to reduce file size for production. Remove comments, whitespace, and optimize markup for faster loading.

Count syllables in text with detailed word-by-word analysis and linguistic statistics.

Create custom QR codes for URLs, text, and contact info

Generate placeholder text for your designs

Convert shoe sizes between US, UK, EU, and international sizing systems. Find your perfect fit for men's, women's, and kids' shoes across different countries.

Generate clean placeholder images with custom sizes, colors, and labels. Perfect for wireframes, mockups, and design systems.

Convert CSV to Excel - Transform comma-separated values to Excel spreadsheet with auto-width columns

Extract specific columns from CSV data. Select which columns to keep and remove the rest instantly.

Generate JSON-LD BreadcrumbList schema markup for SEO. Add breadcrumb items with names and URLs to create structured data that helps search engines understand your site hierarchy.

Find MIME type for file extensions instantly. Look up media types for images, videos, documents, and more.

Convert speeds between miles per hour (MPH), kilometers per hour (KPH), and knots instantly

Generate complete fake person profiles including name, email, phone, and address for testing.

Add or subtract hours, minutes, and seconds to/from any time. Perfect for calculating flight arrivals, work schedules, cooking times, and time zone conversions.

Check if any year is a leap year. Understand leap year rules and find past or future leap years instantly.

Format and beautify JavaScript code with proper indentation, spacing, and line breaks. Perfect for unminifying compressed code or standardizing code style.

Convert multiple images to a single PDF document. Upload images, reorder pages, and customize PDF page size. Supports JPG, PNG, WebP, and all common image formats.

Convert PDF pages to high-quality JPG images. Select specific pages or convert all pages at once. Download as individual images or ZIP file for multiple pages.

Sort CSV by columns - Order CSV rows by one or more columns in ascending or descending order with multi-level sorting support

Extract colors from uploaded image - Get dominant color palette with HEX and RGB values from any photo

Convert GIF images to modern WEBP format with superior compression and quality. Reduce file sizes significantly while maintaining image quality. Perfect for web optimization and faster loading times. All conversions run locally in your browser - files never leave your device.

Remove duplicate rows from CSV files - Deduplicate CSV data by all columns or specific key columns, keeping first or last occurrence

Encrypt and decrypt text using AES (Advanced Encryption Standard) with secure key-based encryption. Protect sensitive data with industry-standard 256-bit encryption.

Create beautiful CSS and Tailwind gradients with a visual editor. Support for linear and radial gradients with full control over colors, angles, and stops.

Handle null and empty values in CSV - Replace, remove, or keep missing data with flexible null handling strategies

Convert next-generation AVIF images to widely-compatible JPG format with adjustable quality settings. Perfect for ensuring maximum browser compatibility and sharing images with older systems. All conversions run locally in your browser - files never leave your device.

Format messy HTML into clean, readable markup with consistent indentation and structure. Perfect for cleaning up minified or poorly formatted templates.

Convert data types in CSV - Transform CSV column values to numbers, booleans, dates with automatic type detection and cleaning

Analyze password strength with real-time feedback, security scoring, and actionable recommendations to create stronger passwords.

Create beautiful neumorphism (soft UI) CSS effects with live preview. Generate soft, extruded 3D elements with dual shadows. Perfect for modern minimalist designs.

Split PDF into multiple files or extract specific pages. Choose from multiple split modes: extract page ranges, split into individual pages, or divide by chunks. Downloads as single PDF or ZIP archive.

Convert HTML markup to clean Markdown syntax. Perfect for content migration, documentation, web scraping, and converting web pages to Markdown format.

Format, validate, and pretty-print JSON with our developer-friendly editor.

Simulate how colors appear to people with color vision deficiencies.

Generate random IPv4 and IPv6 addresses in multiple formats for testing and development.

Generate random paragraphs with grammatically correct sentences for lorem ipsum alternative, testing, and content placeholders.

Extract selected pages into a new PDF. Upload your PDF, preview all pages as thumbnails, select the pages you want to extract, and download a new PDF containing only those pages. Fast, visual, and privacy-focused.

Convert XML markup to JSON format. Perfect for API modernization, data extraction, integrating legacy XML systems with modern JSON APIs, and SOAP to REST migration.

Calculate your daily protein needs based on weight, activity level, and fitness goals. Get personalized recommendations for muscle gain, fat loss, or athletic performance with meal distribution guidance.

Convert HEIC/HEIF images to JPG format with adjustable quality settings. All conversions run locally in your browser - files never leave your device. Perfect for converting iPhone photos to a universally compatible format.

Generate strong, memorable passwords using random words. Create secure passphrases that are easy to remember but hard to crack.

Calculate PPI (pixels per inch) for screens and displays. Find pixel density from resolution and screen size for phones, tablets, monitors, and TVs.

Convert between cups, tablespoons, teaspoons, milliliters, and other cooking measurements. Quick and accurate conversions for recipes and baking.

Minify and compress JavaScript code to reduce file size for production. Remove comments, whitespace, and optimize code for faster loading.

Search and replace text with advanced options. Support for case sensitivity, whole word matching, and regular expressions for powerful text transformations.

Format and beautify TypeScript code with proper indentation, spacing, and line breaks. Preserves type annotations, interfaces, generics, and all TypeScript-specific syntax.

Calculate which day number (1-365/366) any date is in its year. Track progress through the year and find milestone days.

Extract files from ZIP archives - Unzip and download files from ZIP archives directly in your browser

Convert between time zones and see current or custom time across different parts of the world

Convert areas between square feet, square meters, acres, hectares, and square yards instantly

Convert between watts, kilowatts, and horsepower with our simple power converter tool.

Calculate business days between two dates, excluding weekends and optional holidays for accurate work-day planning.

Generate URL-friendly slugs from any text. Create SEO-optimized slugs for blog posts, products, and web pages instantly.

Calculate the extra calories needed for breastfeeding mothers. Get personalized daily calorie recommendations based on your activity level, breastfeeding type, and baby's age.

Convert HTML to React JSX format instantly. Transform class to className, inline styles to objects, and more for React development.

Generate JSON-LD FAQPage schema markup for SEO. Add questions and answers to create structured data that helps search engines display FAQ rich snippets in search results.

Generate professional receipts for free. Create, customize, and download receipts with your business details, itemized purchases, taxes, and payment methods. Print or save as PDF instantly.

Split text by any delimiter into separate lines or segments instantly.

Calculate BMI percentile for children and teens aged 2-20 using CDC growth charts. Get accurate BMI assessment based on age, gender, height, and weight.

Remove duplicate words from your text instantly. Clean up repeated words while preserving word order and sentence structure with smart detection.

Calculate ISO week number for any date. Find which week (1-53) of the year any date falls in.

Count lines, non-empty lines, and analyze text line by line instantly.

Calculate the exact number of days between two dates. Get instant results for total days, business days, weekends, and more. Perfect for project planning, vacation tracking, and deadline management.

Rename CSV columns - Change CSV column headers and standardize naming conventions with camelCase, snake_case, or Title Case

Compress images to reduce file size while maintaining quality. Supports PNG, JPG, and WEBP formats with adjustable quality settings. Convert between formats for optimal compression. All processing runs locally in your browser - files never leave your device.

Calculate optimal sleep and wake times based on 90-minute sleep cycles. Get personalized recommendations for when to sleep or wake up to feel refreshed and energized.

Create beautiful glassmorphism CSS effects with live preview. Generate frosted glass UI with backdrop blur, transparency, borders, and shadows. Perfect for modern web designs.

Flatten nested JSON objects into flat key-value pairs. Convert complex JSON to simple format and back.

Check WCAG contrast ratios to ensure accessible color combinations.

Generate darker variations of any color for design depth and dark themes.

Convert between length, weight, and volume units instantly. Support for metric and imperial systems.

Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly with live conversion

Generate random MAC addresses in multiple formats for testing and development.

Calculate body surface area (BSA) using multiple formulas including Du Bois, Mosteller, Haycock, and Gehan & George. Essential for medical dosing, cardiac index, and burn assessment.

Calculate formula amount needed by age and weight. Get personalized daily formula recommendations, feeding schedules, and supply planning for your baby.

Generate HMAC (Hash-based Message Authentication Code) signatures for message authentication and data integrity verification. Supports SHA-256, SHA-384, SHA-512, and more.

Convert WEBP images to JPG format with adjustable quality settings. All conversions run locally in your browser - files never leave your device. Perfect for universal compatibility and smaller file sizes.

Calculate personalized macros for ketogenic diet. Get your ideal fat, protein, and carb intake based on 75-20-5 keto ratios. Achieve and maintain ketosis for effective weight loss.

Calculate your take-home pay after taxes and deductions. Estimate net salary from gross salary with monthly and annual breakdowns.

Count paragraphs, sentences, words, and analyze text structure instantly.

Generate Twitter Card meta tags for Twitter/X sharing. Create summary cards, large image cards, app cards, and player cards. Optimize how your links appear on Twitter with custom titles, descriptions, and images.

Convert PNG, JPG, and GIF images to modern WEBP format with superior compression and quality. Reduce file sizes by up to 30% compared to JPG while maintaining excellent visual quality. All conversions run locally in your browser - files never leave your device.

Add or subtract days, weeks, months, or years from any date to calculate future or past dates with precision.

Convert JSON data to XML format. Perfect for API integration, data transformation, legacy system compatibility, and SOAP services. Supports nested objects, arrays, and custom formatting.

Calculate your fertile days and ovulation date based on menstrual cycle. Track your fertile window for conception planning and understand your cycle better.

Calculate baby growth percentiles for weight, length/height, and head circumference based on WHO and CDC growth standards. Track your baby development from 0-36 months.

Filter CSV rows based on column values and conditions. Create focused datasets by filtering data instantly.

Convert JSON to Excel - Transform JSON data to Excel spreadsheet with nested object flattening and customizable formatting

Calculate exact age in years, months, and days

Convert XML to CSV - Transform XML documents to comma-separated values with automatic field extraction

Calculate conversion rates for your marketing campaigns, websites, and sales funnels. Find out what percentage of visitors take your desired action.

Calculate target heart rate zones for exercise training. Get personalized HR zones for fat burn, cardio, anaerobic, and peak performance based on age, resting heart rate, and fitness level.

Generate random fake addresses for testing and development purposes.

Calculate your ideal body weight using multiple medical formulas including Devine, Robinson, Miller, and Hamwi methods. Get personalized recommendations based on height, age, and gender.

Format messy CSS into clean, readable styles with consistent indentation and spacing. Perfect for cleaning up minified or poorly formatted stylesheets.

Clean Excel data - Remove empty rows, duplicates, whitespace, and standardize text formatting in Excel files

Calculate Tax Deducted at Source (TDS) for Indian payments with automatic ₹ formatting

Generate Facebook Open Graph meta tags for social media sharing. Create og:title, og:description, og:image, og:url, and og:type tags. Perfect for optimizing how your links appear on Facebook, LinkedIn, WhatsApp, and Slack.

Combine multiple PDF files into one document. Easy drag-and-drop interface with privacy-focused browser-based processing. Upload PDFs, reorder them, and merge into a single file.

Convert Markdown text to HTML markup instantly. Supports headings, lists, links, code blocks, tables, and all standard Markdown syntax.

Convert any date and time to Unix timestamp (epoch time). Get timestamps in seconds and milliseconds.

Calculate your pregnancy due date from last menstrual period or conception date. Get estimated due date, current week, trimester milestones, and time remaining.

Convert WEBP images to PNG format with lossless quality. All conversions run locally in your browser - files never leave your device. Perfect for preserving transparency and maximum quality.

Convert between liters, gallons, cups, and milliliters with our simple volume converter tool.

Format and beautify SQL queries with support for multiple dialects (PostgreSQL, MySQL, SQL Server, SQLite). Configure keyword case, indentation, and minify options.

Generate random times in 12-hour, 24-hour, timestamp, and seconds formats.

Generate SQL INSERT statements from CSV data. Convert spreadsheet data to database-ready SQL queries instantly.

Convert PNG images to JPG format with adjustable quality and transparency handling. All conversions run locally in your browser - files never leave your device. Perfect for reducing file sizes while maintaining image quality.

Look up HTTP status codes and their meanings instantly. Understand error codes and how to fix them.

Convert between KB, MB, GB, and TB with our simple data storage converter tool.

Convert between PSI, bar, pascal, and kilopascal with our simple pressure converter tool.

Generate random browser user agent strings for testing and development.

Calculate the precise difference between two dates in years, months, weeks, days, hours, minutes, and seconds. Perfect for tracking project durations, age calculations, event countdowns, and more.

Convert colors between HEX, RGB, and HSL with live preview, contrast checking, and quick-copy formats for your design system.

Calculate your monthly loan EMI (Equated Monthly Installment) with detailed breakdowns of principal, interest, and total payment.

Count sentences, analyze sentence length, and get detailed sentence statistics instantly.

Convert TSV to CSV - Transform tab-separated values to comma-separated values with automatic quoting

Calculate age-appropriate sleep schedules for babies and toddlers. Get personalized daily schedules with nap times, wake windows, and bedtime recommendations based on your baby's age.

Polish your client messages instantly. AI-powered tool for freelancers to sound professional, confident, and clear in every client communication. Get two polished versions with different tones.

Convert JSON data to CSV spreadsheet format instantly with support for nested object flattening, custom delimiters, and headers. All conversions happen locally in your browser.

Calculate income tax payable and net income after tax with customizable tax rates and deductions

Calculate your daily macronutrient needs (protein, carbs, fats) based on your goals. Get personalized calorie targets and macro splits for fat loss, muscle gain, or maintenance with meal distribution examples.

Calculate days until any future date with countdown for important events, deadlines, and milestones.

Calculate GST inclusive and exclusive prices. Add or remove GST with CGST, SGST, and IGST breakdown for Indian businesses.

Encode and decode URL strings instantly in your browser. Converts special characters to percent-encoding and back. Handles spaces, Unicode, query parameters, redirect URLs, and all RFC 3986 reserved characters.

Test and debug regular expressions with live highlighting, capture groups, and match details. Supports all JavaScript regex flags (g, i, m, s, u).

Remove extra spaces, line breaks, and special characters

Set a countdown timer for any duration. Perfect for cooking, workouts, meetings, and time management with customizable timers and preset options.

Convert JPG images to PNG format with lossless quality. All conversions run locally in your browser - files never leave your device. Perfect for preserving image quality and adding transparency support.

Convert Excel to CSV - Transform Excel spreadsheets (.xlsx, .xls) to comma-separated values with sheet selection

Convert Unix timestamp (epoch time) to human-readable date and time. Supports seconds and milliseconds.

Merge multiple CSV files into a single unified dataset. Combine CSVs with identical headers instantly.

Convert CSV to XML - Transform comma-separated values to XML format with customizable elements and pretty printing

Transform text into study materials instantly. Paste your lecture notes or textbook chapters and get key points, short notes, summary, and exam questions. Perfect for students preparing for exams.

Encode and decode Base64 strings with UTF-8 support. Supports standard Base64 and Base64URL. Perfect for encoding text, handling API tokens, embedding data URIs, and debugging web applications.

Generate lighter variations of any color for backgrounds and light themes.

Generate MD5 and SHA-256 hashes from input text. Perfect for checksums, password verification, data integrity checks, and debugging cryptographic operations.

Calculate discounted prices and savings from an original price and discount percentage. See final price and amount saved instantly.

Calculate working capital and current ratio from your current assets and liabilities. Assess your business liquidity and financial health.

Display current time in multiple cities around the world. Compare time zones and schedule across regions.

Drag and drop to rearrange PDF pages in any order. Upload your PDF, preview all pages as thumbnails, drag pages to reorder them, and download the rearranged PDF. Fast, visual, and privacy-focused.

Calculate daily calorie needs based on age, weight, height, and activity level. Get personalized calorie goals for weight loss, maintenance, or weight gain using the Mifflin-St Jeor equation.

Generate professional invoices for free. Create, customize, and download invoices with your business details, line items, taxes, and payment terms. Print or save as PDF instantly.

Calculate your daily water intake needs based on weight, activity level, and climate. Get personalized hydration recommendations in liters, ounces, cups, and glasses.

Generate strong, random passwords with customizable length and character options. Create secure passwords locally in your browser with real-time strength indication.

Convert CSV to TSV - Transform comma-separated values to tab-separated values with automatic quote removal

Estimate body fat percentage using the US Navy method with simple body measurements. Calculate fat mass, lean mass, and understand your body composition category.

Generate beautiful, harmonious color palettes for UI design, branding, and themes. Choose from random, analogous, complementary, or monochromatic modes. Lock favorite colors and export as HEX, RGB, or JSON.

Calculate gross and net profit margins from your revenue and costs. Analyze business profitability with detailed breakdowns.

Calculate final grade based on assignments and weights. Support multiple assignment categories (homework, quizzes, tests, final exam) with custom weights, show current grade and what's needed on remaining assignments

Calculate running pace, speed, and finish times. Get pace per km/mile, predicted race times, and split times. Perfect for runners training for 5K, 10K, half marathon, or marathon.

Compare two JSON objects and highlight differences. Perfect for debugging API changes and data transformations.

Convert between different time units - seconds, minutes, hours, days, weeks, months, and years.

Calculate the break-even point for your business in units and revenue. Determine how many units you need to sell to cover all costs.

Online stopwatch timer with lap tracking. Measure time intervals precisely for sports, cooking, work tasks, and more.

Preview how your title and meta description appear in Google search results. See real-time character counts, pixel width estimates, and desktop/mobile previews to optimize your SEO.

Remove trailing spaces from the end of each line in your text. Clean up code, emails, and documents by trimming unwanted whitespace instantly.

Visually design layered box shadows with fine-grained controls. Create production-ready CSS and Tailwind utilities for cards, modals, and UI elevations.

Calculate Return on Investment with multi-currency support

Format and beautify PHP code following PSR-12 coding standards with proper indentation, spacing, and line breaks. Perfect for cleaning up messy code or enforcing consistent style.

Generate random fake phone numbers for testing and development purposes.

Generate random colors in HEX, RGB, and HSL formats with preview and customizable options.

Convert CSV data to HTML table format with customizable styling. Generate clean, semantic table markup instantly.

Full-featured scientific calculator with trigonometric, logarithmic, exponential functions, memory operations, and calculation history

Calculate calories burned while cycling based on speed, duration, weight, terrain, bike type, and wind conditions. Get accurate calorie estimates for your cycling workouts.

Generate HTML meta tags for SEO optimization. Create title, description, keywords, viewport, charset, robots, and author meta tags. Perfect for improving search engine rankings and social sharing.

Calculate A/B test statistical significance with chi-square test. Determine which variant wins with confidence levels, p-values, and performance metrics.

Generate random fake email addresses for testing and development purposes.

Generate robots.txt file to control search engine crawlers. Create user-agent rules, allow/disallow paths, set crawl delays, and add sitemap URLs. Perfect for managing bot access to your website.

Convert CSV files or pasted data into JSON format instantly with support for headers, delimiters, and pretty-printed output. All conversions happen locally in your browser.

Calculate your Basal Metabolic Rate (BMR) - the calories your body burns at complete rest. Uses the Mifflin-St Jeor equation for accurate BMR calculation.

Calculate what score you need on your final exam to achieve your target grade. Enter your current grade, final exam weight, and desired grade to instantly see the required final exam score with achievability status

Calculate lean muscle mass based on body weight and body fat percentage. Track your muscle mass, fat mass, and body composition for fitness goals.

Calculate with fractions - add subtract multiply divide. Support all operations with automatic simplification to lowest terms, mixed number support, decimal conversion, and step-by-step solution display

Generate professional freelance proposals instantly with AI. Create complete proposals with introduction, scope, deliverables, timeline, and pricing. Perfect for freelancers, consultants, and agencies bidding on projects.

Calculate percentage of any number, find what percent one number is of another, percentage increase/decrease, and percentage difference with real-time results

Calculate standard deviation and variance. Support both population and sample statistics, paste data from Excel/CSV, show mean, median, variance, standard deviation, and complete statistical analysis

Calculate grade point average from grades. Support multiple GPA scales (4.0, 5.0, 10.0), letter grade to GPA conversion, weighted/unweighted GPA, semester GPA and cumulative GPA tracking

Calculate cumulative college GPA across multiple semesters. Track overall GPA, major GPA, and institutional GPA separately. Supports transfer credits, honors eligibility checking, and semester-by-semester breakdown

Convert steps walked to calories burned. Calculate how many calories you burn based on your steps, weight, and walking intensity. Free instant results with distance and active time estimates.

Generate a tailored, professional cover letter in seconds. Enter the job title, job description, and your experience — the AI writes a compelling 3-paragraph cover letter matched to the role.

Calculate inflation-adjusted values using historical CPI data from 1950-2026. See what past dollars are worth today, or project how much you'll need in the future to maintain purchasing power.

Add page numbers to PDF documents. Choose position (top/bottom, left/center/right), format (1, Page X of Y, X/Y), font size, color, and skip pages. Fast, customizable, and privacy-focused browser-based processing.

Calculate tip amounts and split bills easily. Enter bill amount, tip percentage, and number of people to see tip amount, total cost, and per-person amounts. Includes preset tip percentages (15%, 18%, 20%, 25%).

Calculate MPG and fuel efficiency. Support both US (miles/gallons) and metric (km/liters) units. Shows fuel efficiency rating, cost per mile/km, and annual fuel cost estimates.

Calculate monthly mortgage payment with principal, interest, property taxes, insurance (PITI), and HOA fees. Shows amortization schedule, total interest paid, and payoff date with extra payment scenarios.

Add password protection to your PDF files. Set document open password, owner password, and control permissions for printing, copying, and editing. Secure your sensitive documents.

Remove password protection from PDF files. Enter your known password to unlock the PDF and download an unprotected copy — all processing happens in your browser.

Solve quadratic equations ax²+bx+c=0 instantly. Get real and complex roots, discriminant, vertex, graph visualization, and step-by-step solutions. Perfect for students, teachers, and professionals.

Compare the true cost of renting vs buying a home over time. Calculate breakeven point, equity buildup, investment opportunity cost, and get a personalized recommendation based on your specific situation.

Calculate debt payoff timeline with different strategies. Compare snowball (smallest balance first) vs avalanche (highest interest first) methods to find the fastest and cheapest way to become debt-free.

Rotate PDF pages clockwise or counterclockwise. Upload your PDF, preview all pages as thumbnails, rotate individual pages or all pages at once, and download the rotated PDF. Fast, visual, and privacy-focused.

Reduce PDF file size by removing metadata, annotations, and redundant objects. Choose Low, Medium, or High compression and download with a before/after size comparison.

Calculate how much you need to save for retirement. Project savings growth, estimate monthly retirement income, and see if you're on track to meet your goals with Social Security and inflation adjustments.

Validate HTML markup and check for common issues. Detect missing attributes, accessibility problems, deprecated tags, and structure errors. Free and runs entirely in your browser.

Validate XML syntax and structure with detailed error reporting. Check well-formedness, view element statistics, and debug XML issues. Free and runs entirely in your browser.

Calculate how your savings grow over time with regular deposits. See final balance, total contributions, and interest earned. Includes goal-based mode to find out how much you need to save monthly to reach your target.

Calculate and simplify ratios to lowest terms. Find GCD, decimal ratios, percentages, and generate equivalent ratios instantly.

Calculate auto loan payments and interest with trade-in value, down payment, sales tax, registration fees, and other costs. Compare financing options and see total cost of vehicle ownership.

Validate email address format and check DNS/MX records. Detect typos in common email providers and verify domain deliverability. Free, instant, and secure.

Convert hourly wage to annual salary with overtime calculations. Calculate monthly, biweekly, weekly, and daily pay equivalents for full-time and part-time schedules.

Calculate how your money grows with compound interest. Enter principal, interest rate, time period, and compounding frequency to see final amount, total interest earned, and year-by-year growth breakdown.

Calculate recommended study hours for exams based on material volume, difficulty level, and available time. Get a personalized daily study schedule.

Solve proportions and cross-multiplication problems. Find the missing value in a/b = c/d with step-by-step solutions.

Validate YAML syntax instantly in your browser. Get real-time feedback on errors with exact line and column numbers. Supports multi-document YAML and shows document statistics including nesting depth and key counts.

Calculate your test score percentage and letter grade from points earned. Instantly see your grade, points missed, and how many more points you needed for the next grade up.

Calculate simple interest using the I = P × r × t formula. Enter principal, annual rate, and time period to see interest earned, total amount, daily/monthly/yearly accrual, and a comparison with compound interest.

Calculate your total net worth by entering assets and liabilities by category. See asset allocation, liability breakdown, debt-to-asset ratio, and your financial health snapshot.

Calculate words per page for different formats. Convert between word count and page count based on font size, line spacing, and page size.

Generate bcrypt hashes from passwords and verify passwords against existing bcrypt hashes. Configurable cost factor. Runs entirely in your browser — nothing is uploaded.

Calculate probabilities for events — shows fraction, decimal, percentage, complement, and odds. Supports single events and two independent events (AND/OR).

Calculate the square root of any number. Instantly shows the result, perfect square check, simplified radical form, and cube root.

Calculate rectangle area, perimeter, and diagonal length from length and width. Instantly see aspect ratio with a visual diagram.

Calculate powers and exponents with support for negative and fractional exponents. Shows step-by-step working, reciprocal form, and root equivalents.

Calculate circle area, circumference, radius, and diameter from any one known value. Also computes arc length, sector area, and chord length for a given central angle.

Calculate central tendency measures — mean, median, mode, and range — for any set of numbers, with frequency distribution.

Calculate any side of a right triangle using the Pythagorean theorem (a² + b² = c²). Find the hypotenuse or either leg instantly with formula visualization and triangle diagram.

Calculate triangle area, perimeter, all angles and sides from any valid combination of known values. Supports SSS, SAS, ASA, and AAS input modes.

Calculate monthly car lease payments from MSRP, negotiated price, residual value, and money factor. See depreciation fee, finance fee, effective APR, and total lease cost.

Generate 5 high-converting email subject line variations instantly. Each uses a different copywriting technique — direct, curiosity, urgency, benefit-led, and number-driven — with character counts and open-rate tips.

Convert a colour PDF to grayscale instantly in your browser. All pages are processed locally — nothing is uploaded to any server. Works with scanned documents, presentations, and any PDF file.

Change the page size of any PDF to A4, Letter, Legal, A3, A5, Tabloid, or Executive. Choose how content is fitted — scale to fit, scale to fill, stretch, or centre. All processing runs in your browser. Nothing is uploaded.

Generate personalised B2B cold emails in seconds. Enter the recipient details and your product or service, choose a tone, and the AI writes a concise, reply-worthy email complete with subject line, opening hook, value pitch, and call to action.

Validate CSS syntax instantly in your browser. Get real-time feedback on errors and warnings with exact line and column numbers. Shows rule count, declarations, selectors, at-rules, and comment statistics.

Test HTTP API endpoints directly in your browser. Make GET, POST, PUT, PATCH, and DELETE requests with custom headers and request bodies. View status codes, response headers, and pretty-printed JSON responses — all client-side, no server proxy.