Organize your JavaScript code with industry-standard formatting. Uses Prettier under the hood to handle complex modern JavaScript (ES6+) and JSX.
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JavaScript Formatter
Format, beautify, and minify JavaScript code. Clean up messy JS logic instantly. Free online tool. Fast, free, and 100% private browser tool.
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Select files or drag & drop here
Processed 100% locally in your browser. Your files never touch an external server.
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100% Client-Side Privacy•No File Size Limits•Free Forever
About JavaScript Formatter
FusioFiles 100% Client-Side Privacy Guarantee
Your files and data never leave your browser — processed directly on your device.
Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1
Paste JS
Input your JavaScript or JSON snippets into the tool.
2
Beautify
Watch as dense code is transformed into a readable structure.
3
Export
Save the formatted script or copy it to your clipboard.
Key Features
ES6+ Support
Format modern JavaScript and JSX code.
Minification
Compress JS files for faster loading.
Syntax Highlight
Read your code clearly with color coding.
Local Processing
Your code never leaves your browser.
Frequently Asked Questions
While the tool runs client-side and doesn't send data to us, we always recommend scrubbing secret keys before pasting code into any online tool.
Yes, completely free. No account, subscription, or hidden fees — ever.
Yes. All processing runs directly in your browser — nothing is ever uploaded to a server.
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