Free Online Developer Tools

JSON Formatter

Format, validate, minify, and tree-view JSON data. Handles large files with syntax highlighting.

Formatting

Text Diff Checker

Compare two text blocks side-by-side. See additions, deletions, and changes instantly highlighted.

Compare

UUID Generator

Generate UUID v4, v1, and bulk UUIDs. Copy individual or all at once with one click.

Generator

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and binary safely.

Encoding

URL Encoder / Decoder

URL-encode or decode text for safe query strings. Handles special characters and emoji.

Encoding

Regex Tester

Test regular expressions in real-time. See matches, groups, and replace. Supports flags.

Text

JWT Decoder

Decode and inspect JWT tokens. View header, payload, and signature. Detects expiry.

Security

Markdown Preview

Write Markdown and see the rendered HTML live. Supports tables, code blocks, and GitHub-flavored MD.

Editor

Color Converter

Convert between HEX, RGB, HSL, and OKLCH. Pick colors visually with an interactive color picker.

Converter

Lorem Ipsum Generator

Generate placeholder text. Choose paragraphs, sentences, or words. Classic and modern variants.

Generator

SQL Formatter

Format SQL queries with indentation. Beautify SELECT, INSERT, JOIN, and nested queries.

Formatting

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes. Compare checksums and verify file integrity.

Security