API testing, JSON/DB/Git utilities, DevOps generators, AI dev tools and more — free, no signup for the basics.
Build and send HTTP requests, inspect responses, save history.
Decode and inspect JWT header/payload, verify signatures.
Get a unique inbox URL and inspect incoming webhook requests live.
Run queries against any GraphQL endpoint and browse its schema.
Compare two API responses and see a structured diff.
Design REST endpoint specs and generate docs/mocks from them.
Continuously monitor an endpoint for uptime/latency via cron.
Spin up a public mock endpoint that returns configured responses.
Burst-test an endpoint to find its effective rate limit.
Walk through an OAuth2 Authorization Code flow and inspect tokens.
Design and export CSS gradients.
Searchable reference of common git commands.
Visualize and help resolve merge conflicts.
Generate a changelog from commit history.
Validate, pretty-print, and minify JSON.
Diff two JSON documents.
Build a JSON Schema visually from sample data.
Test JSONPath expressions against sample JSON.
Validate and format YAML documents.
Pretty-print and validate XML.
Convert XML documents to JSON.
Convert between CSV and JSON.
Search and tail uploaded log files.
Summarize error rates/patterns in logs.
Generate App Store/Play Store metadata.
Generate app store release notes.
Generate passwords, API keys, AES keys, UUIDs, and RSA/SSH key pairs — all client-side.
Generate strong random passwords.
Generate MD5/SHA family hashes.
Generate v4/v7 UUIDs in bulk.
Generate secure random tokens/API keys.
Encode or decode Base64 text and files.
Encrypt/decrypt text with common ciphers.
Test CORS behavior of an endpoint.