Code Tools
Essential code utilities for developers across all languages. Test and debug regular expressions with live matching and group highlighting, format and minify JavaScript, HTML, CSS, SQL, Python and PHP, encode and decode Base64, URL strings and HTML entities, decode JWT tokens, generate UUID v1/v4/v7, build and test cron expressions, generate realistic mock data, escape and unescape strings for JSON, HTML, XML and SQL, calculate Unix file permissions, look up HTTP status codes, write HTML/CSS/JS with live preview, convert text to binary, hex and octal, browse the full ASCII table, and convert between CSS units like px, rem, em and pt.
Convert px to rem, rem to px, and px to em instantly. Set your own base font size for accurate, project-specific CSS calculations.
Browse and search every HTTP status code from 1xx to 5xx with plain-language descriptions, real-world use cases, common headers, and related codes.
Escape and unescape strings for JSON, XML, SQL, JavaScript, Python, C/Java, CSV, RegEx, and Shell with real-time conversion.
Browse, search, and copy from the complete ASCII character table with decimal, hex, octal, binary, and HTML entity representations.
Calculate Unix and Linux file permissions in octal, symbolic, and chmod command formats with an interactive read/write/execute permission matrix.
Minify JavaScript, CSS, and HTML in your browser to shrink file size, with live compression stats and per-language options.
Build and test cron job expressions with a visual builder, human-readable descriptions, and a next-execution-time preview.
Write HTML, CSS, and JavaScript and see the result render instantly in your browser — a mini code playground with a built-in console and HTML download.
Generate realistic fake data for testing — names, emails, phones, addresses, and 30+ data types with multi-locale support.
Decode and inspect JSON Web Tokens instantly. View the header, payload, and signature with claim explanations and expiration status, all in your browser.
Format and beautify source code for JavaScript, HTML, CSS, SQL, Python, and PHP with customizable indentation and language-specific options.
Test and debug regular expressions with live matching, color-coded capture groups, replace mode, a built-in cheatsheet, and ten common patterns.