Fast tools for everyday debugging and data cleanup.
JSON, JWT, encoding, API, and regex tools that open fast, stay out of the way, and do the job.
Format, validate, compare, minify, and convert payloads when an API response gets messy.
Decode tokens, fix encoding issues, generate hashes, and reproduce signatures without leaving the browser.
Spot-check a public endpoint or test a regex before you wire it into code.
Start with the tools people reach for most: cleanup a payload, inspect a token, sign a message, test a regex, or check an endpoint.
Browse by task, not by guesswork
JSON Tools
Format, validate, diff, minify, and convert JSON without leaving the page.
JWT Tools
Open a token, inspect claims, and check timestamps without sending it anywhere.
API Tools
Quick checks for public endpoints and the small debugging tasks around them.
Encoding Tools
Base64, URL, HTML, Unicode, hex, hash, and signing tools for common debugging work.
Regex Tools
Test patterns against real text and adjust flags as you go.
These tools are built for quick checks, clean output, and fewer tabs open at once.
The tools most people will start with
JSON Formatter
Format JSON with clean indentation so logs, payloads, and fixtures are easier to read.
JWT Decoder
Decode JWT headers and payloads locally so you can inspect claims and timestamps.
Base64URL Encode / Decode
Encode text as Base64URL or decode URL-safe Base64 back to UTF-8 text.
Hash Generator
Generate MD5, SHA-1, SHA-256, or SHA-512 hashes in the browser.
HTTP Status Checker
Check the status of a public URL from the browser and get a quick response summary.
Regex Tester
Test regular expressions against sample text and see matches immediately.
Short guides that answer the follow-up questions
JSON Formatting Best Practices for API Work
When formatting, validating, and minifying JSON actually help, and when they just add steps.
JWT Debugging Basics Without Leaking Sensitive Tokens
How to inspect JWTs safely without turning a quick debug session into a secret leak.
Common Encoding Mistakes in Web Development
The encoding mistakes that still waste time in real apps: Base64 confusion, broken UTF-8, and bad URL escaping.