Free Online Developer Tools

{ } JSON Formatter

Format, validate, and minify JSON data with tree view

</> Base64 Encoder

Encode and decode Base64 text or files instantly

JWT Decoder

Decode and inspect JSON Web Token header and payload

QR Code Generator

Create QR codes for URLs, text, WiFi, and more

SQL Formatter

Format and beautify SQL queries with proper indentation

Cron Parser

Parse cron expressions and see human-readable schedules

CSV ↔ JSON

Convert between CSV and JSON formats with auto-detection

HTML Entity Encoder

Convert special characters to HTML-safe entities and back

CSS / JS / HTML Minifier

Compress code by removing whitespace and comments

HTTP Status Codes

Complete reference of all HTTP status codes with search

UUID Generator

Generate UUID v4 identifiers in bulk

URL Encoder

URL-encode and decode query strings and paths

Timestamp Converter

Convert between Unix timestamps and human-readable dates

Regex Tester

Test regular expressions with real-time match highlighting

Password Generator

Generate strong, cryptographically random passwords

Markdown Preview

Write and preview Markdown in real time with syntax highlighting

Color Converter

Convert between HEX, RGB, HSL, and pick colors visually

Text Diff Checker

Compare two texts side by side and find every difference