Image to Base64
Turn any image into a Base64 data URL, raw Base64, CSS background-image rule, or ready-to-paste <img> tag.
Processed locally in your browser — nothing is uploaded.
Image to Base64
Files are processed entirely in your browser — nothing is uploaded to any server.
About Image to Base64
Load an image and copy it in whichever inline form you need: the full data URL, the raw Base64 payload, a CSS background-image declaration, or a complete <img> tag with the real width and height filled in.
Inlining avoids an extra network request, which is handy for small icons in emails, single-file HTML documents, and quick prototypes.
Common uses
- Embed a small logo directly in an HTML email
- Inline icons into a single-file demo page
- Paste an image into a CSS-only environment
Limitations
- Base64 is about 33% larger than the binary file, and large inline images slow pages down — the tool warns above 1 MB.
Frequently asked questions
Does my image get uploaded when I convert it to Base64?
No. The file is read and encoded entirely in your browser, so the image and its Base64 text stay on your device — nothing is transmitted or stored anywhere.
What is a Base64 data URL?
It is a URL of the form data:image/png;base64,... that carries the file's entire contents inside the URL itself instead of pointing to a location. Browsers can display it directly in src attributes and CSS, with no separate network request.
Why is the Base64 text larger than my image file?
Base64 represents every 3 bytes of binary data as 4 text characters, which adds roughly 33% overhead. A 300 KB image therefore becomes about 400 KB of text.
When should I embed an image as Base64 instead of linking the file?
Embed small images — icons, tiny logos — where saving a network request or shipping a single self-contained file matters, such as HTML emails and single-file demos. For anything large, serve the file normally; this tool warns above 1 MB because big inline images bloat the page and cannot be cached separately.