HTML / CSS / JS Minifier
Compress and minify HTML, CSS or JavaScript code. Runs entirely in your browser.
Why Use DiffMergy’s HTML, CSS & JS Minifier?
DiffMergy’s Minifier reduces the size of your HTML, CSS, and JavaScript files for faster website loading. It strips unnecessary whitespace, comments, and redundant syntax while preserving functional correctness, with per-language controls for optimization level.
Performance-critical development workflows benefit from instant local processing. There are no file size limits, no server uploads, and no rate limiting — minify as much as you need.
100% Private — No Server Upload
All processing happens entirely in your browser using modern browser APIs. Your sensitive source code, credentials, and files never leave your device — no servers, no databases, no tracking, no sign-up required.
Fast & Reliable
Built with vanilla TypeScript and a lightweight custom engine, DiffMergy delivers sub-millisecond processing with zero network latency. The entire toolkit works on any modern browser across all operating systems, with no installation or setup needed.
Frequently Asked Questions
What can I minify?
HTML, CSS, and JavaScript. The minifier strips whitespace, comments, and redundant syntax per language to reduce file size.
Is there a file size limit?
No. Processing is local and instant, with no upload, rate limit, or size cap.