CSS Sprite Builder
Sprite background-position calculator.
🧩CSS Sprite Builder
All processing happens locallyWhat this tool does
CSS Sprite Builder is a CSS Sprite Builder with live preview and copy-ready CSS output., everything is generated inside your browser, so you can copy the CSS straight into your project.
Change any value and both the code and the preview update instantly.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
Many small icons become one HTTP request, which cuts request count noticeably on icon-heavy pages. With HTTP/2 the gain shrinks but icons still benefit.
background-position offsets the image relative to the element’s top-left, so showing column 3 requires shifting the image left, hence negative values.
Yes unless you supply a 2× sprite and halve it with background-size.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.