Is rewrite_style_attributes enabled by default?

No. rewrite_style_attributes is not in CoreFilters, the default RewriteLevel; it runs only when you enable it by name with EnableFilters.

How do I enable rewrite_style_attributes on Apache and nginx?

Add ModPagespeedEnableFilters rewrite_style_attributes on Apache or pagespeed EnableFilters rewrite_style_attributes; on nginx. On IIS, add pagespeed EnableFilters rewrite_style_attributes to pagespeed.config.

filter · CSS filters

Rewrite style attributes (rewrite_style_attributes)

Q: What does the rewrite_style_attributes filter do?

rewrite_style_attributes applies CSS rewriting (minification, URL rewriting) to inline style="" attributes on HTML elements. rewrite_style_attributes_with_url (Core filter) does the same but only when the style value contains a url() reference.

Category:: CSS
CoreFilters:: No
OptimizeForBandwidth:: No
Risk:: Generally safe

rewrite_style_attributes applies CSS rewriting (minification, URL rewriting) to inline style="" attributes on HTML elements. rewrite_style_attributes_with_url (Core filter) does the same but only when the style value contains a url() reference.

When to use it

Not in CoreFilters: it runs only when you enable it by name.
Risk rating on these docs: Generally safe.

Risks

The CSS filters page lists no specific risks for this filter. If a page misbehaves with it, DisableFilters rewrite_style_attributes turns it off for the scope you set it in.

Configuration

Enable it in the module configuration, at server, virtual-host or location scope:

Apache

ModPagespeedEnableFilters rewrite_style_attributes

nginx

pagespeed EnableFilters rewrite_style_attributes;

IIS (pagespeed.config)

pagespeed EnableFilters rewrite_style_attributes

# Apache
ModPagespeedEnableFilters rewrite_style_attributes
# or, for URL-only (enabled by default as a CoreFilter):
ModPagespeedEnableFilters rewrite_style_attributes_with_url

# Nginx
pagespeed EnableFilters rewrite_style_attributes;
# or, for URL-only (enabled by default as a CoreFilter):
pagespeed EnableFilters rewrite_style_attributes_with_url;

Scoping, ForbidFilters and the thresholds filters read: Choosing filters .

Live example

Applies CSS rewriting to inline style="" attributes.

This filter changes how the page is structured or delivered, not its size, so the example shows a source diff rather than a byte or request reduction.

See the before and after, with the source diff →

Frequently asked questions

What does the rewrite_style_attributes filter do?: rewrite_style_attributes applies CSS rewriting (minification, URL rewriting) to inline style="" attributes on HTML elements. rewrite_style_attributes_with_url (Core filter) does the same but only when the style value contains a url() reference.
Is rewrite_style_attributes enabled by default?: No. rewrite_style_attributes is not in CoreFilters, the default RewriteLevel; it runs only when you enable it by name with EnableFilters.
How do I enable rewrite_style_attributes on Apache and nginx?: Add ModPagespeedEnableFilters rewrite_style_attributes on Apache or pagespeed EnableFilters rewrite_style_attributes; on nginx. On IIS, add pagespeed EnableFilters rewrite_style_attributes to pagespeed.config.

rewrite_style_attributes_with_url — Rewrite style attributes with url()
combine_css — Combine CSS
compute_critical_css — Compute critical CSS
extend_cache_css — Extend cache for CSS
fallback_rewrite_css_urls — Fallback CSS URL rewriting
flatten_css_imports — Flatten CSS @imports
inline_css — Inline CSS
inline_google_font_css — Inline Google Fonts CSS

This page is drawn from the rewrite_style_attributes entry on CSS filters. Every filter in one table: PageSpeed filters.