HTTP Header Analyzer — Security & CORS Audit
Parse and analyze HTTP request or response headers. Identifies categories, explains each header, flags missing security headers, and detects duplicates or suspicious values — entirely in your browser.
How to Use HTTP Header Analyzer — Security & CORS Audit
How to Use the HTTP Header Analyzer
Step 1: Paste Your Headers
Paste raw HTTP headers (one Header-Name: value per line) into the input field. You can paste:
- Request headers copied from browser DevTools → Network → Headers tab
- Response headers from curl output (
curl -I https://example.com) - Headers from API testing tools like Postman or Insomnia
- Any
Key: Valueblock of header lines
Step 2: Review the Results
The analyzer immediately shows:
- Parsed table — header name, category badge (authentication, content, caching, security, CORS, forwarding, custom), and value
- Header explanations — each known header includes a plain-English description
- Security check — lists any recommended security headers not found in the input
- Warnings — flags duplicate headers, missing cookie security attributes, exposed server versions, and wildcard CORS origins
Step 3: Export Results
Click Copy as JSON to copy the parsed headers as a JSON array, or Download JSON to save a full audit report including missing headers and summary statistics.
Header Categories
- Authentication — Authorization, Cookie, Set-Cookie, WWW-Authenticate
- Content — Content-Type, Accept, User-Agent, Host, Location
- Caching — Cache-Control, ETag, Vary, Expires, Age
- Security — CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Permissions-Policy
- CORS — Access-Control-Allow-Origin, Access-Control-Allow-Methods, Origin
- Forwarding — X-Forwarded-For, X-Forwarded-Proto, X-Real-IP
- Custom — Non-standard headers (X-Request-ID, X-API-Version, etc.)
Recommended Security Headers Checked
- Strict-Transport-Security — forces HTTPS within the max-age window (HSTS)
- Content-Security-Policy — restricts resource sources to prevent XSS
- X-Frame-Options — prevents clickjacking by blocking iframe embedding
- X-Content-Type-Options — stops MIME-type sniffing
- Referrer-Policy — controls how much referrer information is shared
- Permissions-Policy — restricts browser feature access (camera, mic, geolocation)
Frequently Asked Questions
Most Viewed Tools
Screen Size Converter — Diagonal Dimension Tool
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.
Use Tool →DPI Calculator — Print Resolution Tool
Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.
Use Tool →Seconds to Time Converter — HH:MM:SS Formatter
Convert seconds to HH:MM:SS time format instantly with precise calculations and easy-to-read formatting.
Use Tool →Password Entropy Calculator — Crack Time Estimator
Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.
Use Tool →TOTP Code Generator — 2FA Testing Tool
Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.
Use Tool →JSONL Formatter — Line-by-Line Validator
Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.
Use Tool →TLS Cipher Suite Checker — Strength Analyzer
Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.
Use Tool →JSON to Zod — Schema Generator
Generate Zod validation schema code from a JSON sample object. Infers z.string(), z.number(), z.boolean(), z.array(), z.object(), and z.null() types automatically. Handles nested objects, arrays of objects with optional field detection, and outputs copy-ready TypeScript with import and z.infer type alias.
Use Tool →Related DevOps & Infrastructure Tools
User Agent Parser — Browser & Device Decoder
Parse user agent strings to extract browser, operating system, device, and engine information. Essential for web analytics, device detection, and browser compatibility testing.
Use Tool →Kubernetes YAML Validator — K8s Manifest Schema & Security Audit
Validate Kubernetes YAML manifests for syntax errors and required field completeness. Checks Deployments, Services, Ingress, ConfigMaps, Secrets, PVCs, HPAs, CronJobs, and more — with per-document results and fix hints.
Use Tool →Log Level Filter — Real-Time Log Parser & Severity Analyzer
Paste log output and filter and highlight lines by severity level with configurable level thresholds
Use Tool →Random User Agent Generator — Browser String Tool
Generate random browser user agent strings for testing and development.
Use Tool →robots.txt Validator — Crawl Rule Checker
Validate your robots.txt file against the Robots Exclusion Protocol. Checks directive syntax, path formats, Crawl-delay values, and Sitemap URLs. Previews crawl rules per user-agent group. Free and runs entirely in your browser.
Use Tool →Query String Parser — URL Parameter Decoder
Parse URL query strings into readable key-value pairs. Decode parameters and inspect URL search queries with ease.
Use Tool →Helm Values Builder — Scaffold, Validate, and Export Helm values.yaml
Configure common Helm chart parameters and generate a values.yaml override file for deployments
Use Tool →SSL Certificate Validator — Chain & Expiry Checker
Paste a PEM certificate to instantly validate expiry, signature algorithm, key strength, SAN presence, and trust chain. Get a clear pass/warn/fail report for each check.
Use Tool →Share Your Feedback
Help us improve this tool by sharing your experience