Developer Tools

Free browser-based developer utilities for formatting, validating, and transforming code. JSON, SQL, GraphQL, JWT, Git, Docker, and more — no sign-up, no server round-trips.

JSON Formatter

Format, validate & minify JSON

Regex Tester

Test regex patterns with live matching

SQL Formatter

Format & beautify SQL queries

GraphQL Formatter

Format GraphQL queries and schemas

Diff Checker

Compare two texts & highlight differences

JWT Decoder

Decode & inspect JSON Web Tokens

JWT Expiration Visualizer

Visualize JWT expiration times

JWT Signature Verifier

Verify JWT signatures and claims

Git Commit Formatter

Format conventional commit messages

Gitignore Generator

Generate .gitignore files for your stack

Docker Tag Validator

Validate Docker image tags

Cron Parser

Parse cron expressions to human-readable

UUID Generator

Generate v4 UUIDs instantly

UUID Version Detector

Detect UUID version and validate

Timestamp Converter

Convert Unix timestamps & dates

YAML Validator

Validate YAML & convert to JSON

JSON Schema Generator

Generate JSON Schema from sample data

JSON Path Finder

Explore JSON structure & find paths

JSON to TypeScript

Generate TS interfaces from JSON