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CSSFlow Custom CSS for WordPress
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CSSFlow 1.0 Coming soon to WordPress.org

Custom CSS for WordPress

Custom CSS made simple for WordPress

Organize custom CSS into clear snippets, target the exact pages or WooCommerce areas you need, and control responsive behavior without scattering styles across your site.

View Documentation See CSSFlow in Action

Free · GPL-2.0-or-later · WordPress 6.4+ · PHP 7.4+

CSSFlow targeting, WooCommerce and responsive CSS controls
WordPress6.4+
PHP7.4+
WooCommerceOptional
LicenseGPL-2.0-or-later
Frontend JSNone
TelemetryNone

Core workflows

Control your custom CSS without losing track of where it belongs

CSSFlow turns scattered CSS into a clear workflow: create a snippet, choose where it applies, control its responsive range, and manage it later from one place.

Organize every CSS snippet

Keep CSS in named snippets with clear status, priority, targeting, responsive settings, search, filters, duplication, sorting, pagination, and bulk actions.

Target exactly where it is needed

Apply CSS across the entire site, selected content, a content type, WordPress special pages, or supported WooCommerce areas.

Handle responsive CSS cleanly

Use All Devices, Mobile, Tablet, Desktop, or a reusable custom breakpoint. CSSFlow creates the required media-query wrapper.

Back up, migrate, and troubleshoot

Export JSON backups, preview imports, download compiled CSS, import Additional CSS safely, regenerate output, and review output health.

See CSSFlow in action

A closer look at the CSSFlow workflow

Move through CSSFlow in a natural order — from managing snippets and targeting CSS to breakpoints, variables, tools, settings, and support.

CSSFlow All CSS screen showing snippet management, status controls, targeting, responsive settings, filters, sorting, and pagination.

1 / 15

Manage all CSS snippets

Search, filter, sort, change status, review targeting, and manage snippets from one organized screen.

Manage all CSS snippets
CSSFlow All CSS screen showing snippet management, status controls, targeting, responsive settings, filters, sorting, and pagination.

More built in

A complete CSS workflow, without unnecessary complexity

The supporting tools stay focused on CSS management rather than turning CSSFlow into a general code-snippet platform.

Reusable CSS variables

Create global variables for colors, spacing, widths, fonts, calculations, gradients, and other valid CSS values.

Enhanced CSS editor

Use WordPress's enhanced CSS editor when available, with a normal textarea fallback and advisory CSS Problems checks.

Generated or inline output

Use generated CSS files by default or choose inline CSS, with automatic inline fallback when file output is unavailable.

Safe Mode

Temporarily suppress CSSFlow frontend CSS through a configuration constant without deleting or disabling your snippets.

Site Health information

Review CSSFlow version, snippet counts, output method, output status, Safe Mode, WooCommerce integration, and breakpoint information.

Privacy-friendly by design

CSSFlow adds no frontend JavaScript, sends no telemetry, and does not require a remote account or cloud service.

Simple workflow

From idea to targeted CSS in four steps

  1. 1 Create a snippet

    Give your CSS a clear name and write the styles you need.

  2. 2 Choose where it applies

    Select the site, content, special page, or WooCommerce context.

  3. 3 Choose the responsive target

    Use all devices, a built-in device range, or a custom breakpoint.

  4. 4 Save and manage

    Activate when ready, then edit, duplicate, filter, back up, or disable later.

Already using WordPress Additional CSS?

Move into an organized workflow without deleting the original CSS

  1. Detect and previewCSSFlow shows the current theme's Additional CSS before importing anything.
  2. Import safelyA new Entire Website / All Devices CSSFlow snippet is created Inactive.
  3. Switch when readyRemove the original manually only when you are ready, then activate the CSSFlow copy.
Read the migration guide →

Developer friendly

Extend stable CSSFlow behavior through public filters

CSSFlow 1.0 exposes a small deliberate developer API around capabilities, targeting providers, compilation, limits, and support resources.

Open the Developer Guide →
PHP cssflow_edit_capability 
function qwd_cssflow_capability( $capability ) {
	return 'manage_options';
}

add_filter(
	'cssflow_edit_capability',
	'qwd_cssflow_capability'
);

Frequently asked questions

A few things to know before you start

Does CSSFlow modify my theme files?

No. CSSFlow stores its own snippet data and outputs CSS without editing your theme files.

Does CSSFlow require WooCommerce?

No. WooCommerce-specific targeting appears only when WooCommerce is available.

What happens if generated CSS files cannot be written?

CSSFlow can automatically fall back to inline output so saved CSS can continue to load.

Does deactivating CSSFlow delete my snippets?

No. Deactivation preserves CSSFlow snippets and configuration.

Does CSSFlow add frontend JavaScript or telemetry?

No. CSSFlow does not require frontend JavaScript and does not include telemetry or remote tracking.

Ready to go deeper?

Read the CSSFlow documentation

Follow practical guides for snippets, targeting, responsive CSS, variables, tools, Safe Mode, troubleshooting, and developer hooks.

Open Documentation WordPress.org release coming soon