Does this rename variables like a full minifier would?

No — this tool only removes comments and unnecessary whitespace; it deliberately avoids variable renaming and other logic-affecting changes.

Could this break my code's behavior?

It is specifically designed to avoid the common ASI (automatic semicolon insertion) hazard by never deleting a newline that separates two statements.

Is my code uploaded anywhere?

No — minification happens entirely in your browser.

Does it handle regular expressions correctly?

Yes — it uses a heuristic based on the preceding token to distinguish a regex literal from a division operator, matching common real-world code patterns.

Does it handle template literals with ${} expressions?

Yes — template literals, including nested ${} expressions, are recognized and preserved as a unit.

How much smaller will my file be?

It depends on how many comments and how much indentation the original had — heavily commented code shrinks the most.

JSON & Code Tools

JavaScript Minifier

Paste JavaScript code and strip out comments and redundant whitespace to reduce its size.

Start Using This Tool

Runs in Your Browser
Instant Results
100% Private

Your Text

Learn More

What Is a JavaScript Minifier?

This JavaScript minifier removes comments and collapses unnecessary whitespace from JavaScript code to reduce its file size, while deliberately avoiding riskier transformations like variable renaming — it never deletes a newline that could change how automatic semicolon insertion (ASI) interprets your code, such as after a return statement.

It correctly recognizes string literals, template literals and regular expressions so that stripping comments and whitespace never corrupts code that happens to contain characters that look like a comment or division operator inside a string.

Who Uses This Tool?

For Business

Reduce the size of a small JavaScript snippet before deploying it.

For Personal Use

Shrink a personal script for a small website.

For Students

Compare formatted vs minified JavaScript for a web performance assignment.

For Offices

Prepare a compact script for an internal tool with size constraints.

Why Use This Tool

Key Features

Comment & Whitespace Removal

Strips // and /* */ comments and collapses redundant whitespace.

String & Regex Safe

Correctly recognizes strings, template literals and regular expressions.

100% Private

Your code is never uploaded — minification happens entirely in your browser.

One-Click Copy

Copy or download the minified result.

The Payoff

Benefits

Smaller File Size

Remove comments and extra whitespace to reduce download size.

ASI-Safe by Design

Never merges lines in a way that could change your code's behavior.

Nothing Uploaded

Safe for proprietary code, since nothing leaves your browser.

Step by Step

How to Use JavaScript Minifier

Paste Your JavaScript

Add commented, formatted JavaScript code.

Read the Minified Result

Comments and extra whitespace are stripped automatically.

Copy or Download It

Use the Copy or Download button to grab the result.

Specifications

Technical Details

Detail	Value
Input	JavaScript source code
Processing	No practical limit — handled entirely by your browser
Output	Removes comments and whitespace only — no variable renaming or logic changes

You Can Verify This

Privacy & Security

What actually happens to your file when you use this tool.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

Get Better Results

Tips

This Is Not a Full Minifier/Mangler

For maximum compression (variable renaming, dead-code elimination), a dedicated build-tool minifier is still worth using in production pipelines.

Keep a Commented Source Copy

Always keep the original, commented source for future maintenance.

Frequently Asked Questions