Recommendations
- PageSpeed
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- Avoid a character set in the meta tag
- Avoid bad requests
- Avoid CSS @import
- Avoid CSS expressions (deprecated)
- Avoid document.write (deprecated)
- Avoid Flash on mobile webpages (deprecated)
- Avoid landing page redirects
- Avoid Plugins (deprecated)
- Combine external CSS (deprecated)
- Combine external JavaScript (deprecated)
- Combine images using CSS sprites
- Defer loading of JavaScript (deprecated)
- Defer parsing of JavaScript
- Enable compression
- Enable Keep-Alive
- Improve server response time (deprecated)
- Inline small CSS
- Inline small JavaScript
- Leverage browser caching
- Leverage proxy caching (deprecated)
- Make landing page redirects cacheable (deprecated)
- Minify CSS
- Minify HTML (deprecated)
- Minify JavaScript
- Minimize cookie size (deprecated)
- Minimize DNS lookups (deprecated)
- Minimize redirects
- Minimize request size
- Optimize images
- Optimize the order of styles and scripts (deprecated)
- Parallelize downloads across hostnames (deprecated)
- Prefer asynchronous resources
- Put CSS in the document head
- Remove query strings from static resources (deprecated)
- Remove unused CSS (deprecated)
- Serve resources from a consistent URL
- Serve scaled images
- Serve static content from a cookieless domain (deprecated)
- Specify a cache validator
- Specify a character set early
- Specify a Vary: Accept-Encoding header (deprecated)
- Specify a viewport for mobile browsers (deprecated)
- Specify image dimensions
- Use an application cache (deprecated)
- Use efficient CSS selectors (deprecated)
- YSlow
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- Add Expires headers
- Avoid AlphaImageLoader filter
- Avoid CSS expressions
- Avoid empty src or href
- Avoid HTTP 404 (Not Found) error
- Avoid URL redirects
- Compress components
- Configure entity tags (ETags)
- Do not scale images in HTML
- Make AJAX cacheable
- Make favicon small and cacheable
- Make fewer HTTP requests
- Make JavaScript and CSS external
- Minify JavaScript and CSS
- Put CSS at the top
- Put JavaScript at bottom
- Reduce cookie size
- Reduce DNS lookups
- Reduce the number of DOM elements
- Remove duplicate JavaScript and CSS
- Use a Content Delivery Network (CDN)
- Use cookie-free domains
- Use GET for AJAX requests
PageSpeed: Minify HTML (deprecated)
Overview
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up downloading, parsing, and execution time.
How does your site score on this recommendation?
Summary
ContentLow
Easy
PageSpeed recommends:
Minifying HTML has the same benefits as those for minifying CSS and JS: reducing network latency, enhancing compression, and faster browser loading and execution. Moreover, HTML frequently contains inline JS code (in <script> tags) and inline CSS (in <style> tags), so it is useful to minify these as well.
Note: This rule is experimental and is currently focused on size reduction rather than strict HTML well-formedness. Future versions of the rule will also take into account correctness.