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Beautify JavaScript online, free
Fast client-side JavaScript minification, dead comment elimination, and clean code formatting without server roundtrips.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- TXT
Set up on this page
- Operation Mode: beautify
How to use JavaScript Minifier & Formatter · JavaScript Minifier & Formatter — frequently asked questions
How to use Beautify JavaScript
- 1
Add your file
Drop a file on the page or click Select Files.
- 2
Check the preset
Operation Mode is set to beautify. You can change it before running.
- 3
Run the tool
Press start. Processing happens on your device.
- 4
Save the result
The result is delivered as JSON.
What JavaScript Minifier & Formatter can do
- Operation Mode: minify and beautify
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
JavaScript Minifier & Formatter — frequently asked questions
What does this page set for Beautify JavaScript?
Operation Mode: beautify. All of these stay editable.
Is my file uploaded?
No. On the web this tool runs in your browser, so your file is not uploaded.
Are there limits?
It takes one input per run. Server jobs accept up to 0 GB. A job can run for up to 15 seconds. In the browser, the practical limit is your device's memory.
What optimizations does the JavaScript minifier perform?
It strips single-line and multi-line comments, compresses unnecessary whitespace, collapses empty lines, and cleans redundant spaces around operators and delimiters without modifying runtime semantics.
Can I use this to format obfuscated or bundled scripts?
Yes. The beautify mode re-indents nested blocks, statements, and functions to make compressed code readable for debugging.
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