CSS Filter Generator

What is the CSS filter property?

filter applies visual effects, blur, brightness, color shifts, shadows, directly to an element in the browser. backdrop-filter applies the same set of effects to whatever is visible behind an element instead of to the element itself, which is how frosted-glass UI cards are built. This generator covers both.

Why use CSS filters instead of editing images?

A filter is a live CSS declaration, not a baked-in pixel change, so it responds to :hover, :focus, dark mode, and container queries without a second image export. One source image can serve a full grayscale, sepia, and full-color state, cutting image requests instead of multiplying them. Filters are GPU-composited, so they animate smoothly with transition where possible, and because the effect lives in your stylesheet, adjusting it later is a one-line change rather than a re-edit in image software.

Filter functions in this generator

• Blur - softens the element with a Gaussian blur.
• Brightness - lightens or darkens the element.
• Contrast - widens or flattens the light-to-dark range.
• Saturate - boosts or mutes colour intensity; a high value is the core of most frosted-glass presets.
• Grayscale - fades colour out, commonly used for a disabled-state icon or a colour-on-hover image.
• Sepia - adds a warm, vintage-photo tint.
• Hue Rotate - shifts every colour around the colour wheel.
• Invert - flips colours to their opposite, useful for a quick dark-mode icon swap.
• Opacity - transparency expressed as a filter function, combinable with the others in one declaration.
• Drop Shadow - a shadow that follows the element's actual alpha shape, not its bounding box. Filter mode only.

For the full syntax, default values, and the url() function for custom SVG filters, see the CSS Filter Guide.

How to use this generator

1. Pick filter or backdrop-filter mode at the top
2. Click a Quick Preset to start from a ready-made look, or build from scratch
3. Adjust the sliders; the preview updates live and only changed values appear in the output
4. In filter mode, toggle on drop-shadow() for a shape-following shadow
5. Click Copy CSS and paste the declaration into your stylesheet

Frequently Asked Questions

Is this CSS filter generator free to use?

Yes. It is free with no sign-up, no login, and no limit on use. Everything runs in your browser using JavaScript, and none of your settings are sent to a server.

Can I generate backdrop-filter CSS as well as filter?

Yes. Use the filter and backdrop-filter tabs above the preview to switch modes. Each mode has its own controls, presets and live preview, and remembers your last settings when you switch back.

Can I combine multiple filter functions at once?

Yes. Adjust as many sliders as you like at the same time, for example blur, brightness and saturate together. Only the functions you have changed from their default are included in the generated CSS, so the output stays clean.

Does the generated CSS work in all browsers?

filter output works in all modern browsers with no prefix needed. backdrop-filter output automatically includes both the standard property and the -webkit-backdrop-filter prefix, since Safari still requires it.

Will this tool save my settings?

No. Nothing is stored or sent anywhere, in keeping with the rest of CSS Toolkit. Refreshing the page resets the generator to its defaults, so copy your CSS before you navigate away.

How do I use the generated CSS with Tailwind CSS?

This generator outputs plain CSS, which you can drop straight into a stylesheet or an arbitrary-value Tailwind class like filter-[blur(6px)]. For the full list of matching Tailwind filter and backdrop-blur utility classes, see the CSS Filter Guide linked below.