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SVG Sprite Sheet to CSS Variables Converter

Convert SVG sprite symbols into CSS variables and icon classes without uploading your icons.

SVG & CSS Engineering Local processing SVG markup is processed locally.

Converter

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Results

Paste SVG sprite markup and convert it to CSS variables.

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    Introduction

    SVG sprites are efficient, but using individual symbols outside a sprite can require extra tooling. This converter turns sprite symbols into standalone CSS icon utilities.

    How it works

    The tool parses sprite symbols, sanitizes their contents, converts each symbol into a standalone SVG data URI, and outputs CSS variables plus icon classes.

    • Symbols are converted to standalone SVG strings.
    • Dangerous elements and event attributes are removed.
    • Data URIs avoid additional network requests.
    • Mask mode allows icons to inherit currentColor.

    How to use

    1. Paste SVG sprite markup.
    2. Choose variable and class prefixes.
    3. Select background, mask, or both output modes.
    4. Convert the sprite.
    5. Copy the generated CSS and HTML example.

    Practical example

    A generated mask icon class can be used like this:

    <span class="icon-check" aria-hidden="true"></span>

    Then control the icon color with normal CSS: 

    .icon-check {
  color: teal;
}

    Use cases

    • Converting legacy SVG sprites.
    • Building lightweight icon systems.
    • Prototyping icon usage without build tools.
    • Reducing icon HTTP requests.
    • Preparing icons for static sites.

    Best practices

    • Use mask mode for monochrome icons.
    • Keep icon names meaningful.
    • Remove unused icons to keep CSS small.
    • Use descriptive class names.
    • Decorative icons should usually be hidden from assistive technology.

    Common mistakes

    • Using background icons when currentColor coloring is needed.
    • Leaving unnecessary fill attributes in mask icons.
    • Creating very large data URI CSS files.
    • Using duplicate symbol IDs.
    • Forgetting accessible labels for meaningful icons.

    Limitations

    • Large sprites can generate large CSS.
    • Icons using internal <use> references may not work as standalone data URIs.
    • Mask support varies slightly by browser.
    • Complex animated SVGs may not compress well into data URIs.

    Browser compatibility

    CSS mask-image is widely supported in current browsers. Include vendor prefixes where necessary for older targets.

    FAQ

    Is my SVG uploaded?

    No. Sprite markup is processed locally in your browser.

    Should I use mask or background mode?

    Use mask mode when icons should inherit currentColor. Use background mode for multicolor icons where the color is baked into the SVG.

    Are data URIs performant?

    They reduce network requests, but very large icons can increase CSS size. Use them for small to medium icons.

    Can it handle sprites without IDs?

    Yes. Missing IDs are replaced with generated names, but adding meaningful IDs is recommended.

    References

    Version and changelog

    • Version: 1.0.0
    • Last updated: August 8, 2026
    • Changelog: Initial production release.