Developer Tools
JSON, encoding, JWT, regex, UUIDs, and other utilities for builders.
JSON Editor
Edit, format, repair, query, compare, and explore JSON in text, tree, and table modes.
JSON Formatter
Format, minify, and validate JSON in your browser.
JSON Validator
Check whether your JSON is valid and locate errors.
Base64 Encoder / Decoder
Encode and decode Base64 text or files live — URL-safe, MIME, and data URIs.
URL Encoder / Decoder
Percent-encode and decode URL components.
UUID Generator
Generate one or many UUID v4 identifiers.
JWT Decoder / Generator
Decode or generate JWTs locally — secrets never leave your browser.
Push Notification Tester
Send a test push notification to Android, iOS, or web device tokens through Firebase Cloud Messaging.
Regex Tester
Test regular expressions against sample text.
Hash Generator
Hash text or files with MD5, SHA-1, SHA-256, SHA-384, SHA-512, and CRC32 — with HMAC and hash comparison.
Password Generator
Create strong random passwords or memorable passphrases, with a live strength meter and crack-time estimate.
Meta Tag Generator & OG Preview
Write SEO, Open Graph, and X card tags and preview how links look on Google, Facebook, X, LinkedIn, and Slack.
SQL Formatter
Format messy SQL into readable queries for PostgreSQL, MySQL, SQL Server, Oracle, BigQuery, and more — or minify it.
cURL Converter
Convert curl commands to JavaScript fetch, axios, Python requests, Go, PHP, Java, C#, and Rust code.
Cron Expression Generator
Build and understand cron schedules: plain-language descriptions, the next 10 run times, presets, and a syntax cheat sheet.
HTTP Status Codes
Search every HTTP status code from 100 to 511 with plain-language explanations, categories, and links to the specs.
.gitignore Generator
Build a .gitignore from templates for languages, frameworks, editors, and operating systems, with duplicates removed.