Is rewrite_style_attributes_with_url enabled by default?

Yes. rewrite_style_attributes_with_url is in CoreFilters, the default RewriteLevel, so it runs unless you turn it off with DisableFilters.

How do I turn off rewrite_style_attributes_with_url?

Add ModPagespeedDisableFilters rewrite_style_attributes_with_url on Apache or pagespeed DisableFilters rewrite_style_attributes_with_url; on nginx. On IIS, add pagespeed DisableFilters rewrite_style_attributes_with_url to pagespeed.config.

filter · CSS filters

Rewrite style attributes with url() (rewrite_style_attributes_with_url)

Q: What does the rewrite_style_attributes_with_url 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:: Yes
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

In CoreFilters, the default RewriteLevel: it runs unless you disable it.
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_with_url 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_with_url

nginx

pagespeed EnableFilters rewrite_style_attributes_with_url;

IIS (pagespeed.config)

pagespeed EnableFilters rewrite_style_attributes_with_url

It is on by default under CoreFilters; to turn it off:

ModPagespeedDisableFilters rewrite_style_attributes_with_url   # Apache
pagespeed DisableFilters rewrite_style_attributes_with_url;   # nginx
pagespeed DisableFilters rewrite_style_attributes_with_url   # IIS

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

Live example

Rewrites inline style attributes only when they contain a url() reference.

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_with_url 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_with_url enabled by default?: Yes. rewrite_style_attributes_with_url is in CoreFilters, the default RewriteLevel, so it runs unless you turn it off with DisableFilters.
How do I turn off rewrite_style_attributes_with_url?: Add ModPagespeedDisableFilters rewrite_style_attributes_with_url on Apache or pagespeed DisableFilters rewrite_style_attributes_with_url; on nginx. On IIS, add pagespeed DisableFilters rewrite_style_attributes_with_url to pagespeed.config.

rewrite_style_attributes — Rewrite style attributes
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_with_url entry on CSS filters. Every filter in one table: PageSpeed filters.