Tools Blog

HTML Minifier / Formatter

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Minify or format HTML live, with an instant byte-size reduction percentage — content inside pre, textarea, script, and style tags is always preserved byte-for-byte.

How it works

  1. Paste your HTML
  2. Pick Minify (compress for production) or Format (re-indent for readability)
  3. The result updates live below — no button, with a size-reduction percentage shown in Minify mode

Frequently asked questions

Does it touch the content inside <pre> or <script> tags?

No — that content is preserved exactly as written. Minifiers that don't do this can break rendering or behavior, which is a documented bug in this category of tool.

How is the size reduction calculated?

It compares the byte length of your original input to the minified output and shows the percentage saved.

Does this update live?

Yes, no button to click.

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Related tools

CSS Minifier / Formatter CSS Minifier / Formatter JavaScript Minifier / Formatter JavaScript Minifier / Formatter

From the blog

There's a real GitHub issue about a minifier mangling the whitespace inside <pre> tags. We wrote a test to make sure ours never does that.
dev

There's a real GitHub issue about a minifier mangling the whitespace inside <pre> tags. We wrote a test to make sure ours never does that.

HTML minifiers have a documented failure mode: touching whitespace inside <pre>, <textarea>, or <script> tags, which can break rendering or behavior. We checked two popular tools — both need a button click. Ours is live and we tested, byte-for-byte, that protected content survives untouched.

2026-08-29

Update history

  • 2026-08-30 Added: a cover image — used as the card thumbnail, social share image, and blog title image.
  • 2026-08-29 Launched: live HTML minify/format (no button), byte-size reduction percentage, pre/textarea/script/style content preserved byte-for-byte.