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JavaScript Minifier

Shrink JavaScript by removing whitespace and shortening names. Paste your input, choose an option and copy the result. It runs in your browser, so your text is never uploaded.

Input0 characters, 0 words
Result
What JavaScript Minifier does
Shrink JavaScript by removing whitespace and shortening names. Paste your code or markup, run the tool and the formatted, converted or checked result appears in the Result box.
JavaScript Minifier has one mode: Minify.
How to use JavaScript Minifier
  1. Paste or type your code or markup into the Input box.
  2. The Minify mode is applied automatically.
  3. The result appears instantly in the Result box.
  4. Click Copy, or Use as input to keep working with it.
About JavaScript Minifier
Web developers move between formats all day: Markdown to HTML, minified code back to something readable, forum markup to the web. Each step is small, but doing it by hand is slow and error prone.
This tool does the job in your browser. It shows readable errors when the input is invalid, which also makes it handy as a quick checker.
JavaScript Minifier FAQ
What is JavaScript Minifier?
JavaScript Minifier is a free online tool. Shrink JavaScript by removing whitespace and shortening names. Paste your code or markup, run the tool and the formatted, converted or checked result appears in the Result box.
How do I use JavaScript Minifier?
Paste or type your code or markup into the Input box. The Minify mode is applied automatically. The result appears instantly in the Result box. Click Copy, or Use as input to keep working with it.
Is JavaScript Minifier free to use?
Yes. It is completely free, with no usage limits, watermarks or paid tiers.
Do I need to sign up or install anything?
No. Open the page and start using it. There is no account, download or browser extension.
Is my data safe when I use JavaScript Minifier?
Yes. Everything runs in your browser, so your code and markup are never uploaded.
What options does JavaScript Minifier include?
JavaScript Minifier has one mode: Minify.
Does JavaScript Minifier work on my phone or tablet?
Yes. The layout adapts to any screen size, and the tool works in mobile browsers on iOS and Android.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari. JavaScript must be enabled.
Can I use the output of JavaScript Minifier commercially?
Yes. The result is yours to use in personal and commercial projects without attribution.
Is there a limit on how much I can enter?
There is no fixed limit. Very large inputs depend on your device's memory and may feel slower on older phones.
How do I copy the result?
Click the Copy button above the Result box. For tools that transform text, Use as input moves the result back to the input so you can apply another change.
Can I use JavaScript Minifier offline?
After the page has loaded, yes. Processing happens in your browser, so the tool keeps working even if your connection drops.
Why do I see an error or an empty result?
A message appears when the input cannot be parsed, for example unclosed tags or a syntax error. Fix the part it points to and run the tool again.
How reliable are the results from JavaScript Minifier?
Formatting and validation follow the standard rules of each language. Converters cover common syntax, so unusual or very advanced markup may need a manual check.
Can JavaScript Minifier handle many items at once?
Yes. Paste as much as you need and the whole input is processed in one go.
Where is JavaScript Minifier useful in real work?
Cleaning up code before sharing or committing it; Debugging broken JSON, HTML and JavaScript; Converting between markup formats; Preparing text for forums, emails and CMS editors.
Which tools are related to JavaScript Minifier?
You may also like URL Parser, JSON Validator, JavaScript Beautifier, JavaScript Syntax Checker. All of them are free and work in the same way.
Does the tool change what my code does?
Formatting and minifying keep the behaviour the same. Converters translate the structure, so always review the output before using it in production.
Can I paste very large files?
There is no fixed limit. Very large inputs depend on your device memory and may feel slower on phones.
Is my code sent to a server?
No. Parsing and conversion run in your browser and nothing is uploaded.
How can I report a problem or suggest a tool?
Use the contact link in the footer. Bug reports and tool ideas are welcome, and popular requests are added regularly.
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