Build faster · 12 tools
Developer Tools
Format data, inspect tokens, test patterns, and automate day-to-day development tasks without leaving your browser.
Category overview
Developer collection
Format data, inspect tokens, test patterns, and automate day-to-day development tasks without leaving your browser.
JSON Formatter & Minifier
Beautify, validate, or minify JSON data instantly.
Popular
Base64 Encoder / Decoder
Securely encode or decode Base64 strings in-browser.
URL Encoder & Decoder
Safely percent-encode or decode URL parameters online.
Bulk UUID v4 Generator
Generate secure, random v4 UUIDs instantly.
Online Regex Tester
Test JavaScript regular expressions with live highlights.
Popular
Text Diff Checker
Compare two texts side by side with color-coded diffs.
New
JWT Decoder & Inspector
Decode and inspect JSON Web Tokens with expiration alerts.
New
OG Image Creator
Design 1200×630 Open Graph preview images for X, LinkedIn, Discord & iMessage.
New
Code Screenshot Generator
Turn code into beautiful shareable images with syntax highlighting.
New
Markdown Preview & Editor
Write Markdown and see it rendered live with HTML export.
New
Cron Expression Explainer
Understand any cron schedule in plain English with next run times.
New
Fake Dummy Data Generator
Generate realistic dummy data instantly in JSON, CSV, or SQL formats.
New