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Polyglot Formatter is a lightweight browser-based code beautifier that automatically detects and formats HTML, CSS, JavaScript, PHP, and JSON. Designed for developers, it provides instant code cleanup and readability improvements without requiring a server, build process, or account. Everything runs locally in the browser for maximum privacy and convenience.
The formatter supports mixed-language files, nested code blocks, configurable indentation, line wrapping, syntax highlighting, and post-format validation. With a modern editor interface, responsive design, and one-click clipboard integration, it is ideal for quickly cleaning up source code, debugging formatting issues, and improving code consistency across multiple languages.
Features
- 🧠 Automatic language detection – identifies HTML, CSS, JavaScript, PHP, and JSON
- 🔍 Deep formatting engine – formats nested <style>, <script>, and mixed PHP/HTML code
- 📏 Configurable indentation – choose between 2 or 4 spaces
- 📄 Line wrapping control – adjustable wrap length from 40 to 300 characters
- ↩️ Preserve newlines – keep existing line breaks when desired
- ⚙️ Deep mode formatting – optional aggressive formatting of nested string content
- 🔑 Preserve quoted keys – maintains quoted JSON keys without modification
- 🎨 Syntax highlighting – highlighted output powered by Prism.js
- 📝 CodeMirror editor – line numbers, bracket matching, and auto-closing support
- 📋 One-click copy – instantly copy formatted output to clipboard
- 📱 Responsive layout – optimized for desktop, tablet, and mobile devices
- 🌙 Material Darker theme – consistent dark UI across the application
- 🛡️ Post-format validation – warns about potential formatting issues after processing
- ⚡ Client-side processing – no server, account, or build tools required
- 🌐 Multi-language support – HTML, CSS, JavaScript, PHP, and JSON in one tool
Project Samples
