A suite of precision developer tools — API testing, JSON transformers, regex builders, and more. Stop context-switching. Start building.
Hand-picked utilities covering the full development lifecycle — from API design to deployment checks.
Send HTTP requests, inspect headers, and test endpoints right in your browser.
Try it free →Format, minify, and convert JSON to YAML or CSV instantly with syntax highlighting.
Try it free →Build and test regex patterns live with named groups, flags, and match highlighting.
Try it free →Decode and inspect JSON Web Tokens — header, payload, claims, and expiry.
Try it free →Visual cron expression editor with human-readable output and next run times.
Try it free →Parse any URL into its components, inspect query params, encode and decode strings.
Try it free →Encode, decode, and hash strings with MD5, SHA-1, SHA-256, and SHA-512.
Try it free →Connect to WebSocket servers, send messages, and inspect frames in real time.
Try it free →Compare two blocks of text or JSON and see exactly what changed, line by line.
Try it free →Convert Unix timestamps to dates and back. See relative time, ISO 8601, and timezones.
Try it free →Format and beautify HTML with proper indentation and syntax highlighting.
Try it free →Convert between HEX, RGB, HSL, and OKLCH instantly. Pick colors visually.
Coming soonGenerate UUIDs v1, v4, and v7 in bulk. Copy to clipboard with one click.
Coming soonConvert between binary, octal, decimal, and hex instantly.
Coming soonNo bloat. No dark patterns. Every tool is designed to get out of your way and let you ship.
Everything runs in your browser. Your tokens, queries, and payloads never leave your machine.
Save and share tool configs, request collections, and regex patterns with your whole team.
Automate any tool from your pipeline. Trigger JSON transforms, linting, and hashing via REST or npx.
Designed ground-up for dark environments. No blinding white flashes, ever.
$ devcrate jwt decode --token
eyJhbGciOiJSUzI1NiJ9...
✓ Header
alg: RS256
typ: JWT
✓ Payload
sub: "user_9kx3p"
iat: 1742549200
exp: 1742552800 ✓ valid
scope: "read write"
✓ Signature verified via JWKS
$
All 12 tools free to start. Upgrade when you need higher limits, exports, and saved configurations. No surprise charges, no dark patterns.
Stop switching between tabs and half-baked tools. Everything you need, in one place, free to start.