Instant HTML Minifier
Performance preset
Source HTML
Minified Output
Free HTML Minifier – Compress HTML Code Online
Our HTML minifier removes whitespace, comments, redundant attributes, and other markup bloat so every byte you ship is doing real work. Whether you’re polishing a landing page, exporting CMS templates, or tuning Core Web Vitals, this tool gives you clean, production-ready HTML in seconds.
Why use a dedicated HTML minifier?
Better performance
Trimmed markup reduces Time to First Byte and improves Largest Contentful Paint, especially on mobile networks.
Lower bandwidth
Ship smaller payloads through CDNs and APIs, saving on data transfer and edge caching costs.
Cleaner deploys
Generate deterministic, minified artifacts to commit alongside your CSS/JS bundles.
When to run HTML minification
- Before production deploys: Add minification to your CI/CD pipeline or run it manually for static exports.
- When handing code to clients: Deliver optimized templates that are harder to accidentally break.
- For server-side rendering: Pair with hydration scripts to reduce initial HTML payloads.
How the minifier works
We use a safe set of regex operations tailored for HTML documents: remove HTML comments, collapse excess whitespace, strip redundant whitespace between tags, normalize attribute spacing, and keep everything UTF-8 friendly. Because everything runs locally in your browser, your markup is never uploaded or stored anywhere.
Best practices
- Keep a prettified version in source control. Minified output is for production, not collaboration.
- Minify after templating. Run this tool after CMS or build-step placeholders are rendered.
- Validate generated HTML. Pair with our HTML validator to catch stray tags before publishing.
Frequently Asked Questions
Yes. Inline scripts remain untouched except for whitespace between tags, so function bodies and JSON blobs stay intact.
No. All processing happens inside your browser using JavaScript. You can even disconnect from the internet after loading the page.
Most documents see 15–45% savings, depending on how much whitespace and comments the source contains.
This UI is manual, but you can copy the minified output directly into your pipeline or reference the logic for your own Node/Gulp plugins.