Is this minifier safe for production?

It performs safe, conservative minification — removing comments and whitespace while preserving strings. For maximum compression and variable mangling, use build-time tools like Terser and cssnano.

Does it upload my code?

No. Minification runs entirely in your browser, so your code is never sent to a server.

Why is my JS only slightly smaller?

This tool removes comments and whitespace but does not rename variables or restructure code. Dedicated bundlers achieve more by mangling names — at the cost of complexity.

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HTML / CSS / JS Minifier

Free · No Server

Minify HTML, CSS, and JavaScript safely in your browser — strips comments and whitespace with size savings.

HTML / CSS / JS Minifier

Input · 57 bytes

Minified · 33 bytes (42% smaller)

.btn{color:#fff;padding:8px 16px}

A safe, dependency-free minifier — strips comments and redundant whitespace. For production builds, pair with Terser/cssnano.

What is Code Minifier?

The HTML / CSS / JS Minifier shrinks source code by removing comments and redundant whitespace, all in your browser. Pick a language, paste your code, and instantly get minified output with the input/output byte counts and a percentage saving. It performs safe, conservative minification that preserves strings, so your minified code keeps working.

How to Use

1
Select a language
Choose HTML, CSS, or JavaScript.
2
Paste your code
Paste the source you want to minify into the input.
3
View the minified output
The minified code and size savings appear instantly.
4
Copy the result
Click Copy to grab the minified code.

Common Use Cases

Shrinking inline CSS or JS snippets
Reducing payload for embeds and emails
Quick minification without a build step
Comparing original vs minified size

Key Features

HTML, CSS, and JavaScript modes
Comment and whitespace removal
Input/output byte counts
Percentage size savings
Preserves strings safely
100% in-browser, copy-ready

🔒

100% Private — No Server Required

All processing happens directly in your browser. No data is uploaded, stored, or transmitted to any server.

Frequently Asked Questions

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Last reviewed on June 14, 2026 by the AiTechWorlds Tools Team. All processing runs locally in your browser.

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What is Code Minifier?