Embedding a small image as Base64 removes an HTTP request: handy for icons, logos in HTML emails, test favicons or self-contained prototypes. Drop the file and copy the data URI, the <img> tag or the CSS rule directly.
Mind the cost: Base64 is ~33% larger than the original binary and is not cached separately. Perfect for assets of a few KB; for large images, a normal compressed file is better.
How it works
- 1
Drop the image you want to embed.
- 2
Check the resulting size (Base64 adds ~33%).
- 3
Copy the data URI, the
or the CSS in one click.
Frequently asked questions
When is Base64 better than a file?
For small assets (under ~10 KB) you want self-contained: icons, dividers, logos in HTML emails or single documents. For content images, a normal file compresses and caches better.
Why is the Base64 bigger than my image?
Base64 encodes every 3 binary bytes as 4 text characters — 33% extra by design. The tool shows you exact before/after sizes so you can decide.
Are my images uploaded to a server?
No. All processing happens inside your browser using the Canvas API: your files never leave your device, there are no upload queues, and the tool even works offline once the page has loaded.