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Code & Data Tool
JavaScript Minifier
Compact JavaScript snippets without running them.
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About this tool
What is JavaScript Minifier?
JavaScript Minifier compacts JavaScript snippets by removing whitespace and comments without running them. It suits small scripts and size comparisons; larger projects should use a build tool.
Useful when you need to
- Shrink a bookmarklet or small script
- See how much of your file is comments and spacing
- Prepare a compact inline script
How to use
How to use JavaScript Minifier
01 02 Minify
Run the tool.
03 Check size
See how much smaller the output is.
04 Test
Run the minified code in your own environment before relying on it.
Tips
Get better results
- Missing semicolons in the original can cause problems once lines are joined, so test carefully.
- Keep your readable source.
FAQ
Frequently asked questions
Does it rename variables?
It focuses on compacting text rather than aggressive renaming, so savings are modest compared with build tools.
Is my script executed?
No.
Is it private?
Yes, everything stays in your browser.
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