Free Developer Tools

Format, validate, and beautify JSON instantly in your browser.

Validate JSON syntax and check for errors instantly.

Compress JSON by removing whitespace for smaller payloads.

Compare two JSON objects side by side and find differences.

Format and prettify XML documents with proper indentation.

Format and validate YAML configuration files.

Format SQL queries with proper indentation and keyword casing.

Format and indent HTML markup for readability.

Format and beautify CSS stylesheets.

Format and beautify JavaScript code.

Test regular expressions with live match highlighting.

Decode JWT tokens locally — header, payload, and claims.

Encode text to Base64 instantly.

Decode Base64 strings to plain text.

Preview and download images from Base64 strings.

Convert images to Base64 data URIs.

Percent-encode strings for URLs and query parameters.

Decode percent-encoded URL strings.

Generate random UUIDs (v4) instantly.

Generate MD5, SHA-1, and SHA-256 hashes.

Convert Unix timestamps to dates and back.

Parse cron expressions into human-readable schedules.

Generate placeholder text for designs and prototypes.

Generate QR codes from text or URLs.

Convert between HEX, RGB, and HSL color formats.

Convert length, weight, temperature, and data units.

Compare two text blocks and highlight differences.

Live Markdown editor with rendered HTML preview.

Build and test HTTP requests — lightweight Postman alternative.

Format, parse, and convert cURL commands.