Image to Base64
Turn any image into a Base64 data URI for embedding directly in HTML or CSS. Optionally wrap it as a CSS background, then copy it - all done in your browser.
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About the Image to Base64 tool
This tool encodes an image as a Base64 data URI - a text string of the form data:image/png;base64,... that contains the whole file inline. Because the picture travels as text, you can paste it straight into HTML or CSS and skip a separate image request. It is popular for tiny icons, email signatures, single-file demos, and bundling a small asset where an extra HTTP round trip is not worth it.
How to use it
- Choose the image you want to encode.
- Copy the generated data URI, or use the CSS background wrapper to get a ready
background-imagerule. - Paste it into your
imgtag'ssrc, your stylesheet, or your markup.
One trade-off to know: Base64 makes the data roughly 33 percent larger than the original binary, so it is best for small images - large files bloat your HTML or CSS and are usually better left as normal linked files that the browser can cache. Inlined images are re-downloaded with every page rather than cached separately. The encoding happens entirely in your browser, so the image is never uploaded to a server.
Frequently asked questions
What is a Base64 data URI?
It is a string like data:image/png;base64,iVBORw0... that embeds the entire image as text. Browsers treat it as a self-contained image source, so no separate file request is needed.
When should I embed an image as Base64 instead of linking it?
Inlining suits small assets such as icons or a logo in an email signature, where avoiding an extra request helps. For larger or reused images, a normal linked file is better because the browser can cache it.
Does Base64 make the image bigger?
Yes. Base64 encoding adds about 33 percent to the byte size compared with the raw binary, so it is a poor fit for large images you embed in HTML or CSS.
Is the image uploaded to generate the Base64 string?
No. Encoding is done in your browser, so the file stays on your device and nothing is sent to a server.