Image to Base64
Turn any image into a Base64 data URI right in your browser. Copy the raw string, a ready-made img tag, or a CSS background rule. Your image is never uploaded.
About the Image to Base64
Image to Base64 turns an image into a Base64 data URI you can paste straight into HTML or CSS, no separate file needed. It is handy for small icons, inline logos, email signatures, and embedding assets where an extra request is not worth it. Drop or pick an image and the tool reads it with the browser's FileReader, so the file stays on your device and is never uploaded.
How it works
- Drop an image onto the box or click to pick one from your device.
- The browser reads the file as a data URI and shows a preview right away.
- Copy the raw data URI, the ready-made <img> tag, or the CSS background-image rule.
- Check the encoded size, which runs about 33 percent larger than the original binary.
Features
- Drag and drop or file picker, with an instant preview of the chosen image.
- Full data URI output with a one-click copy button.
- Ready-to-paste <img> tag and CSS background-image snippets, each with its own copy button.
- Encoded size and a clear note that Base64 adds roughly one third to the file size.
- Runs fully in your browser using FileReader, so images never leave your device.
Frequently asked questions
Is my image uploaded to a server?
No. The image is read in your browser with the FileReader API and encoded locally. Nothing is sent or stored anywhere.
What is a Base64 data URI?
It is a text version of your file in the form data:image/png;base64,XXXX. You can drop it directly into an img src or a CSS url() so the image loads without a separate file.
Why is the Base64 string larger than my image?
Base64 packs 3 bytes of binary into 4 text characters, so the encoded output is about 33 percent bigger than the original file. That is expected.
When should I inline an image instead of linking it?
Inlining suits small assets like icons or a logo, where avoiding an extra request helps. For large images, a normal file link is usually faster and easier to cache.
Which formats work?
Any image your browser can open works, including PNG, JPG, WebP, GIF, and SVG. The data URI keeps the original format and its transparency.