Toolgeist › Developer

Data URI Generator — Any File to a data: URI, Free

Upload any file to convert it into a data: URI with the correct MIME type prefix automatically detected, ready to inline directly into CSS, HTML or a JSON config — processed entirely in your browser, so the file is never uploaded to a server.

How to use Data URI Gen

1. Upload your file.
2. Review the auto-detected MIME type.
3. Copy the generated data: URI.
4. Paste it wherever you need an inline asset.

Frequently asked questions

How is this different from Image to Base64?

This works for any file type, not just images — CSS fonts, small documents, and other assets can all be converted to a data: URI here.

Is my file uploaded anywhere?

No. The conversion runs entirely in your browser using the File API.

When should I avoid inlining a file as a data URI?

For anything reasonably large — inlining adds roughly 33% overhead from Base64 encoding and prevents the browser from caching the asset separately, so it is best reserved for small files.

Related Developer tools

• Robots.txt
• Sitemap Gen
• Tree Visualizer
• Digital Storage Pro
• Text to Hex
• JSON Explorer

Also searched for: file to data uri converter · convert file to base64 data url · inline asset data uri generator

Browse all 738 free tools on Toolgeist →