HTML minifier with lint-like capabilities.

npm install html-minifier
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NPM version Build Status devDependency Status

HTMLMinifier is a highly configurable, well-tested, Javascript-based HTML minifier, with lint-like capabilities.

See corresponding blog post for all the gory details of how it works, description of each option, testing results and conclusions.

Test suite is available online.

Also see corresponding Grunt plugin.

How does HTMLMinifier compare to another solution — HTML Minifier from Will Peavy (1st result in google search for "html minifier")?

Site Original size (KB) HTMLMinifier (KB) Will Peavy (KB)
Wikipedia 401.4 385.5 396.3
Stackoverflow 200.4 165.3 168.3
Amazon 245.9 237.1 225
ES6 table 117.9 82 92
HTMLMinifier page 48.8 41.3 43.3

Installing with npm:

npm install html-minifier

Options Quick Reference

Option Description Default
removeComments Strip HTML comments false
removeCommentsFromCDATA Strip HTML comments from scripts and styles false
removeCDATASectionsFromCDATA Remove CDATA sections from script and style elements false
collapseWhitespace Collapse white space that contributes to text nodes in a document tree. false
collapseBooleanAttributes Omit attribute values from boolean attributes false
removeAttributeQuotes Remove quotes around attributes when possible. false
removeRedundantAttributes Remove attributes when value matches default. false
useShortDoctype Replaces the doctype with the short (HTML5) doctype false
removeEmptyAttributes Remove all attributes with whitespace-only values false
removeOptionalTags Remove unrequired tags false
removeEmptyElements Remove all elements with empty contents false
lint Toggle linting false

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