Image to Base64

Upload your image — drag it in or click to browse. A preview and the file name appear.

Choose the output — pick Data URI (ready for an HTML <img> tag), CSS (for a background-image rule), or Raw Base64 (just the encoded text).

Copy or download — click the copy icon to grab the string, or the download icon to save it as a .txt file. ```

No. The converter runs entirely in your browser using client-side JavaScript, so your image is read and encoded on your own device and never uploaded. Nothing is stored once you close the tab. That keeps sensitive graphics private, and the encoding is instant because there's no round-trip to a server.

Base64 is a way of representing binary data — like an image — as plain text using a limited set of ASCII characters. A Data URI wraps that text with a prefix (for example data:image/png;base64,...) so a browser can render it directly in an HTML img tag or CSS, without loading a separate file.

Three. Data URI gives you a complete string ready to drop into an HTML <img src="...">. CSS wraps it for a background-image: url(...) rule. Raw Base64 is just the encoded text with no prefix, for when you need to handle the wrapping yourself or store the value. Pick whichever matches where you'll paste it.

Yes — Base64 encoding makes the data roughly 33% larger than the original binary file, because it represents bytes using a restricted text alphabet. For small icons, that increase is usually outweighed by saving a separate HTTP request. For large images, the extra bytes add up, so a regular (compressed) image file is normally the better choice.

Use it for small, frequently-used assets — icons, tiny logos, simple SVGs — where inlining the data saves a network request and keeps everything in one file. Avoid it for large photos or images reused across many pages, since the size overhead and the fact that inlined data isn't cached separately work against you there.

For HTML, paste a Data URI into an image tag: <img src="data:image/png;base64,iVBOR...">. For CSS, use it in a background rule: background-image: url("data:image/png;base64,iVBOR...");. Selecting the CSS output format gives you the wrapper ready to go, so you can paste it straight into your stylesheet.

No. Base64 is a lossless text representation of the exact same bytes — decoding it gives back an identical file. It doesn't recompress or alter the image at all; it only changes how the data is written. Any quality difference would come from the original image, not from the encoding.

Use the Base64 to Image tool, which decodes a Base64 string or Data URI back into a downloadable image file. This page handles the encode direction; the companion tool handles the decode direction, so together they cover both ways of working with Base64 image data.

You can encode common image formats — PNG, JPG, SVG, WebP, GIF, and more. The Data URI keeps the correct MIME type for the format you uploaded, so the browser knows how to render it. SVGs in particular are popular as Data URIs because they're small and scale cleanly.

There's no server-imposed limit because everything runs locally, but encoding a large file uses your device's memory and produces a very long string. Base64 is really meant for small assets, so for the best experience stick to icons and optimised graphics rather than full-resolution photos.

Yes. Click the copy icon to copy the entire string to your clipboard for instant pasting, or the download icon to save it as a standard .txt file — handy for sharing with a team or storing alongside your project files.

Yes. It runs in your phone's browser with nothing to install, so you can encode an image to Base64 on Android or iOS and copy the result. It's mainly a developer tool, so you'll usually use it on a computer, but it works on mobile when you need it.