Newest Tools

Discover our latest additions. Fresh tools added regularly to help you work smarter.

HTTP Retry Policy Builder — Configure Resilient API Client Logic

Configure max retries, initial delay, backoff multiplier, jitter, max delay cap, and retryable HTTP status codes to instantly generate ready-to-use retry policy code for Axios (with axios-retry), native Fetch API (Node 18+ and node-fetch), and Go net/http. Supports presets for Standard, Aggressive, Conservative, and Rate-Limit Aware policies. All code is generated in your browser — free, instant, no signup.

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Webhook Retry Config Calculator — Simulate Exponential Backoff & Jitter

Configure exponential backoff parameters and preview the full retry schedule for webhook delivery. Enter max attempts, initial delay, multiplier, jitter, and a max delay cap to instantly see each retry timestamp, cumulative elapsed time, jitter range, and which delays hit the cap. Supports presets for standard, aggressive, conservative, Stripe-style, and fixed-interval retry policies. Free and runs entirely in your browser.

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API Latency Budget Calculator — Plan Distributed System Performance

Set a P99 SLO latency target and distribute the budget across your upstream service dependencies. See remaining headroom, utilization percentage, a stacked allocation bar, and a per-service breakdown with optional P99 actual measurements.

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GraphQL Cost Estimator — Analyze Query Complexity and Depth

Assign custom field weights to a GraphQL schema and calculate the total query complexity score. Paste any GraphQL query, configure per-field costs, and get a per-field breakdown table showing depth, multipliers, and cumulative cost.

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OpenAPI to Postman Converter — Convert Swagger Specs to Test Collections

Convert OpenAPI 3.x JSON or YAML specs into a ready-to-import Postman Collection v2.1. Paths, methods, parameters, request bodies, and tags are all mapped automatically.

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OAuth PKCE Generator — Create Secure Code Verifiers and Challenges

Generate RFC 7636 PKCE code verifier and challenge pairs for OAuth 2.0 authorization code flow. Choose verifier length, get the SHA-256 code challenge, and see exactly where each value goes in the auth URL and token exchange request.

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ASCII Table Generator — Create Plain Text and Unicode Grid Layouts

Generate ASCII and Unicode box-drawing tables from CSV or TSV data. Choose from 6 border styles including Unicode single/double lines, classic ASCII, Markdown, PostgreSQL, and minimal. Ready for terminal output, README files, and documentation.

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Markdown to Slack Converter — Translate MD to Slack mrkdwn Syntax

Paste Markdown text and instantly get Slack-ready mrkdwn. Converts headings, bold, italic, strikethrough, code blocks, links, and lists to the correct Slack syntax. Free and runs in your browser.

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OpenAPI Mock Generator — Turn API Specs into Live Mock Servers

Paste an OpenAPI 3.x or Swagger 2.0 spec, select any endpoint, and instantly get a realistic mock request body and response matching the defined schemas. Also generates a ready-to-run cURL command.

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JSON Size Analyzer — Visualize and Optimize API Payload Density

Paste any JSON payload to instantly see its raw byte size, minified size, and real gzip estimate. Field-by-field breakdown sorted by largest contributor helps you find what to trim first.

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Character Encoding Converter — Fix Mojibake and Convert Text Encodings

Convert text between UTF-8, Latin-1 (ISO-8859-1), Windows-1252, and ASCII encodings. View hex byte representation and see which characters are lost in conversion. Runs entirely in your browser.

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String Template Tester — Live Preview and Debug Variable Injection

Test string templates with real variable values across 7 syntax styles: JS ${var}, Python {var}, Mustache {{var}}, printf %s, Shell $var, Ruby #{var}, and Windows batch %var%. Paste your template, enter variables, and see the rendered output instantly.

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