
How to use the JSON Formatter & Validator
Format, beautify, validate and minify JSON with clear error messages and line numbers.
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Beautify minified or messy JavaScript, TypeScript, JSON, CSS and HTML with clean indentation.
Make minified or badly formatted code readable again. Powered by the widely used js-beautify library, it formats JavaScript (and TypeScript-style syntax), JSON, CSS and HTML with consistent indentation. Great for debugging third-party scripts or cleaning up copied code.
Here is the whole process, step by step. It takes less than a minute from opening the tool to seeing your result.
Your result updates as you type — there is nothing to press and nothing to wait for.
Everything runs in your browser — your files and text never leave your device.
Yes. The JavaScript, CSS & HTML Beautifier on Apex Tool Station is 100% free with no signup and no watermark. Browser tools have no usage limits.
No. Everything runs locally in your browser using JavaScript. Your files and text never leave your device, which makes it safe for private documents.
Yes. The tool works on any modern browser on Android, iPhone, Windows, Mac and Linux.
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The JavaScript, CSS & HTML Beautifier is free, with no signup and no watermark. Open it and try it now. Paste any text and watch the result update as you type.

Format, beautify, validate and minify JSON with clear error messages and line numbers.
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Encode text to Base64 or decode Base64 back to text, with full UTF-8 and URL-safe support.
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Percent-encode text for safe use in URLs and query strings, or decode encoded URLs.
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Escape <, >, &, quotes and special characters into HTML entities, or decode entities back.
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