Image
Image to Base64 Converter
Embed icons as Base64 data URIs without extra network requests. Processing stays on your device — no upload, no account.
How to use Image to Base64 Converter
- Choose an image file (PNG, JPG, GIF, WebP, SVG, etc.).
- Convert to generate a data URI.
- Copy the raw string or ready-made CSS/HTML snippets.
Why use this free image to base64 tool?
- All processing happens locally in your browser. Your files are never uploaded to a server.
- Copy-ready CSS background and HTML img snippets.
- Uses FileReader.readAsDataURL - no server.
- Clear size warnings for oversized embeds.
Technical details
Data URIs inline binary assets as Base64 text. That removes an HTTP request for tiny icons, which can help critical-path CSS, but Base64 expands size by roughly a third and defeats shared browser caching.
FileReader.readAsDataURL produces a string like data:image/png;base64,.... We also wrap it in sample CSS and HTML so you can paste into emails or single-file prototypes quickly.
Avoid embedding multi-megabyte photos. Prefer compressed WebP/PNG under ~10-20 KB for UI chrome. Use Image Resizer first when needed.
Because encoding is local, API keys and confidential screenshots never hit a conversion API.
Image to Base64 Converter FAQ
When should I use Base64 images?
Tiny icons and single-file demos. For large photos, normal image URLs perform better.
Is my file uploaded?
No. All processing happens locally in your browser. Your files are never uploaded to a server.
Can I decode back to a file?
Yes - use Base64 to Image Converter.
Does SVG work?
Yes, when the browser can read it as a file; you will get a data:image/svg+xml URI.
Related free converters
More private browser tools people use with image to base64.