Developer Tools

Format JSON, encode Base64, generate UUIDs, test regex, build CSS gradients, and more — all free, all running locally in your browser.

Text & Data Formatters

JSON Formatter

Format, validate, and minify JSON with syntax highlighting. Pinpoint syntax errors with precise line numbers — perfect for debugging API responses.

JSON to CSV

Convert JSON arrays to CSV with auto-detected headers. Handles nested objects and special characters. Open the result in Excel or Sheets.

CSV to JSON

Convert CSV data to a JSON array with auto-typed values and quoted-field handling. Paste your CSV and copy clean JSON in one click.

SQL Formatter

Format and beautify SQL queries with proper indentation and keyword highlighting. Supports MySQL, PostgreSQL, SQL Server, and SQLite dialects.

Markdown to HTML

Convert Markdown to clean HTML with live side-by-side preview. Supports GFM tables, code blocks, task lists, and inline formatting.

HTML to Markdown

Convert HTML to clean, readable Markdown — preserves links, images, headings, and lists. Strips inline styles for a portable result.

XML Formatter

Format, validate, and indent XML with syntax highlighting. Pinpoint malformed tags with line-accurate error messages — handy for SOAP and configs.

Encoders & Decoders

Base64 Encode/Decode

Encode and decode Base64 strings or files. Round-trip text, binary data, and images without any server upload — Web Crypto powered.

URL Encode/Decode

Encode and decode URLs, query strings, and form parameters. Handles unicode, reserved characters, and percent-encoding correctly.

JWT Decoder

Decode JWT tokens to inspect header, payload claims, and expiration. Tokens are parsed locally — never sent to a server, safe for production debugging.

HTML Entity Encode/Decode

Encode and decode HTML entities — convert special characters like <, >, & to HTML-safe text and back. Supports numeric and named entities.

Generators

UUID Generator

Generate v4 (random) and v7 (time-ordered) UUIDs in bulk — up to 100 at a time. Cryptographically secure via the Web Crypto API.

Password Generator

Generate cryptographically strong passwords with custom length and character sets. Powered by Web Crypto — never sent over the network.

Hash Generator

Generate SHA-1, SHA-256, SHA-512, and MD5 hashes from text or files. Use for integrity checks, fingerprints, and quick deduplication.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text by paragraphs, sentences, or words. Adjustable length for design mockups, layouts, and content prototypes.

QR Code Generator

Generate QR codes for URLs, Wi-Fi credentials, contact cards, and plain text. Customize colors and download as PNG or scalable SVG.

CSS Tools

Color Picker & Converter

Pick colors visually and convert between HEX, RGB, and HSL in real time. Includes a recent colors palette and one-click copy for any format.

CSS Gradient Generator

Build CSS gradients visually — linear, radial, and conic. Drag color stops, fine-tune angles, and copy production-ready CSS in one click.

Box Shadow Generator

Build CSS box shadows visually with multiple stacked layers, inset toggle, and live preview. Copy production-ready CSS in one click.