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

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