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.
Date & Time Tools
Convert timestamps, format dates, and work with timezones locally.
Crypto Tools
Generate passwords, hashes, and work with cryptography in your browser.
Color Tools
Convert colors, pick palettes, and work with gradients for your designs.
CSS Tools
Format CSS, generate gradients, and build flexbox layouts visually.
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.
Learn by doing with practical guides
How to Format JSON: A Practical Developer Guide
Learn how to format JSON for readability, common use cases, and step-by-step examples with real-world scenarios.
How to Validate JSON: A Comprehensive Step-by-Step Tutorial
Learn how to validate JSON, common errors to look for, and practical examples from real-world development.
How to Compare Two JSON Documents Effectively
Learn how to compare JSON files, spot differences, and understand what changed with real-world debugging workflows.