PageSpeed (mod_pagespeed<\/a>) optimizes\u00a0your site and makes content load more quickly. PageSpeed applies a variety of filters including minifying scripts, inlining CSS, and automatically deferring JavaScript to avoid blocking DOM rendering.\u00a0Users can browse your site with less latency, and in turn, improve\u00a0visitor engagement.<\/p>\n PageSpeed is available on all v5+ Plattformen<\/a>. PageSpeed is enabled by default.<\/p>\n PageSpeed is built as modular filters. These filters, in turn, may be\u00a0added and removed to a web site resulting in a variety of optimizations. Filters may be added or removed in a .htaccess-Datei<\/a>. \u00a0By default, all filters listed in\u00a0\u00a0 Note: In the heading, “CF” is CoreFilters and OFB is “OptimizeForBandwidth”.<\/span><\/p>\nAvailability<\/h2>\n
Filter usage<\/h2>\n
CoreFilters<\/code> (refer to Filter list<\/span>) are enabled.<\/p>\n\n
.htaccess<\/code> in your Dokumentenstamm<\/a> if it does not already exist\n\n
\nModPagespeedEnableFilters<\/span> filtera<\/span>,<\/span>filterb<\/span><\/code><\/li>\n
\nModPagespeedDisableFilters<\/span> filtera<\/span>,<\/span>filterb<\/span><\/code><\/li>\n<\/ul>\n<\/li>\nCoreFilters<\/code><\/li>\n<\/ol>\nFilter list<\/h3>\n
\n\n
\n \nFilter Name<\/th>\n In\u00a0CF<\/th>\n In\u00a0OFB<\/th>\n Brief Description<\/th>\n<\/tr>\n<\/thead>\n \n add_head<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Adds a <head><\/code> element to the document if not already present.<\/td>\n<\/tr>\n\n combine_heads<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Combines multiple <head><\/code> elements found in document into one.<\/td>\n<\/tr>\n\n inline_import_to_link<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Inlines <style> tags comprising only CSS @imports by converting them to equivalent <link> tags.<\/td>\n<\/tr>\n \n outline_css<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Externalize large blocks of CSS into a cacheable file.<\/td>\n<\/tr>\n \n outline_javascript<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Externalize large blocks of JS into a cacheable file.<\/td>\n<\/tr>\n \n move_css_above_scripts<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Moves CSS elements above <script><\/code> tags.<\/td>\n<\/tr>\n\n move_css_to_head<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Moves CSS elements into the <head><\/code>.<\/td>\n<\/tr>\n\n combine_css<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Combines multiple CSS elements into one.<\/td>\n<\/tr>\n \n rewrite_css<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Rewrites CSS files to remove excess whitespace and comments, and, if enabled, rewrite or cache-extend images referenced in CSS files. In OptimizeForBandwidth mode, the minification occurs in-place without changing URLs.<\/td>\n<\/tr>\n \n fallback_rewrite_css_urls<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Rewrites resources referenced in any CSS file that cannot otherwise be parsed and minified.<\/td>\n<\/tr>\n \n rewrite_style_attributes<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Rewrite the CSS in style attributes by applying the configured rewrite_css filter to it.<\/td>\n<\/tr>\n \n rewrite_style_attributes_with_url<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Rewrite the CSS in style attributes if it contains the text ‘url(‘ by applying the configured rewrite_css filter to it<\/td>\n<\/tr>\n \n flatten_css_imports<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Inline CSS by flattening all @import rules.<\/td>\n<\/tr>\n \n prioritize_critical_css<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Replace CSS tags with inline versions that include only the CSS used by the page.<\/td>\n<\/tr>\n \n make_google_analytics_async<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Convert synchronous use of Google Analytics API to asynchronous<\/td>\n<\/tr>\n \n rewrite_javascript<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Rewrites JavaScript files to remove excess whitespace and comments. In OptimizeForBandwidth mode, the minification occurs in-place without changing URLs.<\/td>\n<\/tr>\n \n rewrite_javascript_external<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by rewrite_javascript. Rewrites JavaScript external files to remove excess whitespace and comments. In OptimizeForBandwidth mode, the minification occurs in-place without changing URLs.<\/td>\n<\/tr>\n \n rewrite_javascript_inline<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by rewrite_javascript. Rewrites inline JavaScript blocks to remove excess whitespace and comments.<\/td>\n<\/tr>\n \n include_js_source_maps<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Adds source maps to rewritten JavaScript files.<\/td>\n<\/tr>\n \n combine_javascript<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Combines multiple script elements into one.<\/td>\n<\/tr>\n \n canonicalize_javascript_libraries<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Redirects JavaScript libraries to a JavaScript hosting service.<\/td>\n<\/tr>\n \n inline_css<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Inlines small CSS files into the HTML document.<\/td>\n<\/tr>\n \n inline_google_font_css<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Inlines small CSS files used by fonts.googleapis.com into the HTML document.<\/td>\n<\/tr>\n \n inline_javascript<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Inlines small JS files into the HTML document.<\/td>\n<\/tr>\n \n local_storage_cache<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Cache inlined resources in HTML5 local storage.<\/td>\n<\/tr>\n \n insert_ga<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Adds the Google Analytics snippet to each HTML page.<\/td>\n<\/tr>\n \n rewrite_images<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Optimizes images, re-encoding them, removing excess pixels, and inlining small images. In OptimizeForBandwidth mode, the minification occurs in-place without changing URLs.<\/td>\n<\/tr>\n \n convert_jpeg_to_progressive<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Converts larger jpegs to progressive format. Implied by recompress images.<\/td>\n<\/tr>\n \n convert_png_to_jpeg<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Converts gif and png images into jpegs if they appear to be less sensitive to compression artifacts and lack alpha transparency. Implied by recompress images.<\/td>\n<\/tr>\n \n convert_jpeg_to_webp<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Producess lossy webp rather than jpeg images for browsers that support webp. Implied by recompress images.<\/td>\n<\/tr>\n \n convert_to_webp_lossless<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Replaces gif and png images with webp images on browsers that support the format.<\/td>\n<\/tr>\n \n insert_image_dimensions<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Adds width<\/code> und height<\/code> attributes to <img><\/code> tags that lack them.<\/td>\n<\/tr>\n\n inline_images<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by rewrite_images. Replaces small images by data:<\/code> urls.<\/td>\n<\/tr>\n\n recompress_images<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by rewrite_images. Recompresses images, removing excess metadata and transforming gifs into pngs.<\/td>\n<\/tr>\n \n recompress_jpeg<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Recompresses jpegs, removing excess metadata.<\/td>\n<\/tr>\n \n recompress_png<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Recompresses pngs, removing excess metadata.<\/td>\n<\/tr>\n \n recompress_webp<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Recompresses webps, removing excess metadata.<\/td>\n<\/tr>\n \n convert_gif_to_png<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Optimizes gifs to pngs.<\/td>\n<\/tr>\n \n strip_image_color_profile<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Strips color profile info from images.<\/td>\n<\/tr>\n \n strip_image_meta_data<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Strips EXIF meta data from images.<\/td>\n<\/tr>\n \n jpeg_sampling<\/a><\/code><\/td>\nYes<\/td>\n Yes<\/td>\n Implied by recompress_images. Reduces the color sampling of jpeg images to 4:2:0.<\/td>\n<\/tr>\n \n resize_images<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by rewrite_images. Resizes images when the corresponding <img><\/code> tag specifies a smaller width<\/code>und height<\/code>.<\/td>\n<\/tr>\n\n resize_rendered_image_dimensions<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by rewrite_images. Resizes an image when the rendered dimensions of the image are smaller than the actual image.<\/td>\n<\/tr>\n \n inline_preview_images<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Uses inlined low-quality images as placeholders which will be replaced with original images once the web page is loaded.<\/td>\n<\/tr>\n \n resize_mobile_images<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Works just like inline_preview_images<\/code>, but uses smaller placeholder images and only serves them to mobile browsers.<\/td>\n<\/tr>\n\n remove_comments<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Removes comments in HTML files (but not in inline JavaScript or CSS).<\/td>\n<\/tr>\n \n collapse_whitespace<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Removes excess whitespace in HTML files (avoiding <pre><\/code>, <script><\/code>, <style><\/code>, und <textarea><\/code>).<\/td>\n<\/tr>\n\n elide_attributes<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Removes attributes which are not significant according to the HTML spec.<\/td>\n<\/tr>\n \n extend_cache<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Extends cache lifetime of CSS, JS, and image resources that have not otherwise been optimized, by signing URLs with a content hash.<\/td>\n<\/tr>\n \n extend_cache_css<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by extend_cache. Extends cache lifetime of otherwise unoptimized CSS resources by signing URLs with a content hash.<\/td>\n<\/tr>\n \n extend_cache_images<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by extend_cache. Extends cache lifetime of otherwise unoptimized images by signing URLs with a content hash.<\/td>\n<\/tr>\n \n extend_cache_scripts<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Implied by extend_cache. Extends cache lifetime of otherwise unoptimized scripts by signing URLs with a content hash.<\/td>\n<\/tr>\n \n extend_cache_pdfs<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Extends cache lifetime of PDFs by signing URLs with a content hash.<\/td>\n<\/tr>\n \n sprite_images<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Combine background images in CSS files into one sprite.<\/td>\n<\/tr>\n \n rewrite_domains<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Rewrites the domains of resources not otherwise touched by PageSpeed, based on MapRewriteDomain<\/code>und ShardDomain<\/code> settings in the config file.<\/td>\n<\/tr>\n\n trim_urls<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Shortens URLs by making them relative to the base URL.<\/td>\n<\/tr>\n \n pedantic<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Add default types for <script> and <style> tags if the type attribute is not present and the page is not HTML5. The purpose of this filter is to help ensure that PageSpeed does not break HTML4 validation.<\/td>\n<\/tr>\n \n remove_quotes<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Removes quotes around HTML attributes that are not lexically required.<\/td>\n<\/tr>\n \n add_instrumentation<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Adds JavaScript to page to measure latency and send back to the server.<\/td>\n<\/tr>\n \n convert_meta_tags<\/a><\/code><\/td>\nYes<\/td>\n No<\/td>\n Adds a response header for each meta<\/code> tag with anhttp-equiv<\/code> attribute.<\/td>\n<\/tr>\n\n defer_javascript<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Defers the execution of JavaScript in HTML until page load complete.<\/td>\n<\/tr>\n \n dedup_inlined_images<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Replaces repeated inlined images with JavaScript that loads the image from the first occurence of the image.<\/td>\n<\/tr>\n \n lazyload_images<\/a><\/code><\/td>\nNo<\/td>\n No<\/td>\n Loads images when they become visible in the client viewport.<\/td>\n<\/tr>\n \n
![convert_png_to_jpeg<\/a><\/code><\/td>\n](\"https:\/\/developers.google.com\/speed\/pagespeed\/module\/filter-image-optimize#png_to.jpeg\"){kind=link}
![recompress_jpeg<\/a><\/code><\/td>\n](\"https:\/\/developers.google.com\/speed\/pagespeed\/module\/filter-image-optimize#recompress.jpeg\"){kind=link}
![recompress_png<\/a><\/code><\/td>\n](\"https:\/\/developers.google.com\/speed\/pagespeed\/module\/filter-image-optimize#recompress.png\"){kind=link}
![convert_gif_to_png<\/a><\/code><\/td>\n](\"https:\/\/developers.google.com\/speed\/pagespeed\/module\/filter-image-optimize#convert_gif_to.png\"){kind=link}