freecodebeautify.app is a free online code beautifier that instantly formats messy, minified, or poorly indented code into clean, readable output. Paste JavaScript, HTML, CSS, JSON, XML, or SQL and get properly formatted code in one click. Your code never leaves your browser — freecodebeautify.app runs entirely client-side with zero tracking and no server uploads.
freecodebeautify.app uses industry-standard libraries to parse and reformat your code. JavaScript, HTML, and CSS are processed by js-beautify, the same engine used by millions of developers worldwide. SQL formatting uses sql-formatter with configurable keyword casing. JSON is parsed natively and re-serialized with your chosen indentation. XML uses a lightweight formatter that properly nests tags and attributes. Simply paste code into the input panel, and freecodebeautify.app auto-detects the language and applies the correct formatter.
freecodebeautify.app supports six languages: JavaScript (ES6+, JSX, TypeScript), HTML, CSS (including SCSS and LESS input), JSON, XML, and SQL. The auto-detection engine analyzes your code structure — looking for HTML doctypes, CSS selectors, SQL keywords, JSON brackets, XML declarations, and JavaScript syntax — to select the right formatter automatically. You can also manually select the language from the toolbar.
freecodebeautify.app gives you full control over formatting output. Choose between spaces and tabs for indentation, set the indent size to 2, 4, or 8 spaces, select a brace style for JavaScript (collapse, expand, or end-expand), and set the line wrap length (none, 80, 120, or 160 characters). All settings are saved to your browser and persist across sessions, so freecodebeautify.app remembers your preferences every time you return.
Yes. freecodebeautify.app processes everything locally using JavaScript in your browser. No code is transmitted to any server. There are no analytics scripts, no cookies, no tracking pixels, and no third-party requests beyond loading Google Fonts on first visit. This makes freecodebeautify.app safe for formatting proprietary source code, configuration files with API keys, database queries, and any other sensitive content.
Yes. freecodebeautify.app is a Progressive Web App that caches all formatting libraries and the full interface after your first visit. Once cached, you can beautify code without an internet connection. The service worker uses a cache-first strategy, so the tool loads instantly even on slow connections.
Drag and drop any supported file onto the input panel, or click the Upload button in the header. freecodebeautify.app accepts .js, .jsx, .ts, .tsx, .html, .htm, .css, .scss, .less, .json, .xml, .svg, and .sql files. The tool detects the language from both the file content and the file extension, then formats it with your current settings.
freecodebeautify.app supports JavaScript, HTML, CSS, JSON, XML, and SQL. It auto-detects the language from your code, or you can select it manually.
Yes, freecodebeautify.app is completely free. There is no sign-up, no account, and no usage limits. All code formatting happens in your browser.
Absolutely. Your code never leaves your browser. freecodebeautify.app has zero tracking, no analytics, no cookies, and no server-side processing. Everything runs locally.
Yes. You can choose between spaces and tabs for indentation, set the indent size (2, 4, or 8 spaces), and configure language-specific options like brace style for JavaScript.
Yes. You can drag and drop a file onto the input area or click the upload button to select a file. Supported file types include .js, .html, .css, .json, .xml, and .sql.
Yes. freecodebeautify.app is a Progressive Web App (PWA) that works offline after your first visit. All formatting libraries are cached locally in your browser.