Developer Tools

Formatters, generators, and converters built for developers — fast and private.

Formatters

Format, validate, and beautify JSON data instantly in your browser. Free online JSON tool.

Format and beautify SQL queries with support for multiple dialects. Free online SQL tool.

Write and preview Markdown with live rendering and syntax highlighting. Free online editor.

Convert Markdown to a downloadable PDF file instantly in your browser. Free online converter.

Compare two text blocks and see additions and deletions highlighted. Free online diff tool.

Generate strong, random passwords with customizable length and character types. Free and secure.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text instantly. Free online hash tool.

Build cron expressions visually with a human-readable preview. Free online crontab generator.

Test regular expressions with real-time match highlighting. Free online regex tool.

Create robots.txt files with a visual editor. Select user-agents, set allow/disallow rules, add sitemap. Free online tool.

Generate HTML meta tags for SEO, Open Graph, and Twitter Cards. Live Google SERP preview. Free online tool.

Encode text to Base64 or decode Base64 to text instantly. Free online encoder/decoder.

Encode text to URL format or decode URL-encoded strings instantly. Free online URL encoder/decoder.

Convert Unix timestamps to dates and dates to Unix timestamps. Free online epoch converter.

Convert JSON to CSV or CSV to JSON instantly. Free online converter with download option.

Convert images to Base64 data URIs instantly. Drag and drop, preview, and copy. Free online tool.

Convert numbers between binary, octal, decimal, and hexadecimal. Includes ASCII table lookup.