CSS Filter Generator

How to Use

Drag any slider to adjust that filter function, the preview box above (a colorful gradient by default, easy to see subtle changes against) updates live and the CSS code below stays in sync. Sliders left at their default value (0 for most, 100% for brightness, contrast, opacity, and saturate) are automatically omitted from the output to keep the generated code minimal, so the CSS you copy only ever contains the functions you actually changed. Click Reset All to snap every slider back to its default and clear the output back to filter: none;.

Each Filter Function Explained

Blur applies a Gaussian blur, its value in pixels controls the blur radius, larger numbers blur more aggressively. Brightness scales every pixel's luminance, 100% is unchanged, 0% is solid black, and values above 100% push the image brighter, even past white. Contrast stretches or compresses the difference between light and dark areas, 0% is a flat mid-gray, 100% is unchanged, higher values make darks darker and lights lighter. Grayscale desaturates the element, 0% is full color and 100% is completely black-and-white. Hue-rotate shifts every color's position around the color wheel by the given degree value, a fun way to recolor an image without touching the underlying file. Invert flips each color to its opposite, 100% produces a full photographic-negative effect. Opacity, as a filter function specifically, behaves like the standalone opacity property, fading the element toward fully transparent. Saturate controls color intensity, 0% removes all color (similar to full grayscale), 100% is unchanged, and values above 100% produce oversaturated, vivid colors. Sepia applies a warm brownish tone reminiscent of old photographs, with 100% being the strongest effect.

How Filters Combine

The CSS filter property accepts a space-separated list of functions and applies them in the order they're written, each function processing the output of the one before it. This tool builds that list in a fixed order (blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, sepia) regardless of which sliders you touched or in what sequence, since the underlying filter functions in this particular set don't meaningfully interact based on order for most everyday combinations. Where order can matter more is combining a spatial effect like blur with color effects, blurring first and then adjusting brightness looks slightly different from adjusting brightness first and then blurring, because blur mixes neighboring pixel values together before the color adjustment runs. For the color-only functions (brightness, contrast, saturate, and similar), the visual difference from reordering is typically negligible for most everyday design use.

Performance Considerations

CSS filters, especially blur, are relatively expensive for the browser to render compared to simpler properties, since the browser needs to recompute pixel values across the entire filtered region, and doing that on every frame during an animation or scroll can cause visible jank on lower-powered devices. Modern browsers offload much of this work to the GPU, which handles it well for reasonably sized elements, but applying a heavy blur to a full-page background or a large video element is worth testing on real hardware, particularly older phones, before shipping it as a permanent effect rather than a brief transition.

Common Use Cases

Grayscale is a common way to visually indicate a disabled or inactive UI state, like a grayed-out unavailable product thumbnail, without needing a separate image asset. Brightness and opacity together are frequently used to dim a background image behind overlaid text for readability, a lighter-weight approach than adding a separate dark overlay div in some layouts. Blur shows up in "reveal" hover effects, image previews that sharpen on hover, and privacy-style content blurring. Sepia and slight saturation reduction are popular for a vintage or nostalgic photo treatment applied purely in CSS, no image editing software required, and hue-rotate is a quick way to generate several on-brand color variants of a single icon or illustration asset without exporting multiple files.

Common Mistakes

Applying a filter to a large container expecting it to affect only the background is the most common surprise, filter always applies to the element and everything rendered inside it, so text and child elements get filtered too, see the FAQ below for the workaround. Confusing filter with backdrop-filter is another frequent mix-up, they use the same function names but affect completely different layers of the page, filter changes the element's own rendering, backdrop-filter changes what shows through behind it. Finally, using filter: opacity() instead of the plain opacity CSS property when you only need to fade an element is an unnecessary complication, the standalone opacity property does the same thing more simply and is what most codebases and CSS frameworks expect; reach for the filter version specifically when you're already combining opacity with other filter functions in one declaration.

Frequently Asked Questions

Can I combine multiple filters at once?

Yes, the CSS filter property accepts multiple functions space-separated in one value, exactly what this tool generates. All the sliders you adjust away from their default combine into a single filter declaration applied together.

Does filter work on all elements, or just images?

CSS filter works on any element, images, videos, divs, entire sections, not just images. It's commonly used for hover effects, dimming a background, or applying a consistent visual treatment across a whole component.

What is the difference between filter and backdrop-filter?

filter (what this tool generates) applies its effect to the element itself and everything rendered inside it, its own background, borders, and content. backdrop-filter, a related but separate CSS property, instead applies its effect to whatever is visible behind the element, through any transparency, without touching the element's own content, the effect behind a frosted-glass navigation bar that blurs the page scrolling underneath it, for example. They use the same function syntax (blur(), brightness(), and so on) but target different layers of the page.

Why does applying a filter to a parent element also affect its children?

The filter property applies to an element and its entire rendered subtree as a single unit, there's no way to filter a container's own background without also filtering the text and child elements inside it. If you only want to affect a background image or a specific child, apply the filter directly to that child element instead of to its parent, or use an absolutely positioned pseudo-element/overlay carrying the filtered background separately from the text sitting on top of it.

Are CSS filters supported in all browsers?

Yes, the filter property (and every function this tool generates: blur, brightness, contrast, grayscale, hue-rotate, invert, opacity, saturate, and sepia) has been supported in all major modern browsers, Chrome, Firefox, Safari, and Edge, without a vendor prefix for many years, so the code this tool outputs can be used directly without additional fallback rules for any reasonably current browser.

Is my custom filter configuration sent anywhere?

No. Every slider adjustment, the live preview, and the generated CSS code are all handled directly in your browser with plain JavaScript, nothing about your filter settings is transmitted to a server, logged, or stored beyond your current visit.