How it works
Upload an image and the tool reads its exact bytes and encodes them as a Base64 data URI — ready to copy and paste directly into an <img src> attribute or a CSS background-image.
Image to Base64
Convert an image into a Base64 data URI — no sign-up, no upload, no file size limit.
Drop an image here, or click to browse
Your files never leave your device. Everything runs locally in your browser — nothing is uploaded to a server, so there's no file size limit, no subscription, and no one but you ever sees what's in your file.
Frequently asked questions
What is a Base64 data URI used for?+
It lets you embed an image's actual data directly inside HTML, CSS, or JSON instead of linking to a separate file — useful for small icons, inline email images, or avoiding an extra network request for a tiny graphic.
Does converting to Base64 make the file bigger?+
Yes — Base64 encoding is about 33% larger than the original binary file, since it represents binary data using only text characters. It's a trade-off for embedding convenience, not a way to save space.
Is the image recompressed during conversion?+
No — this reads your file's exact original bytes and encodes them as-is, so there's no quality loss beyond what your original file already had.
Is my image uploaded anywhere?+
No. This tool runs entirely in your browser using JavaScript — your image is read and encoded without ever being sent to a server.
Keep a backup of your original file. This tool processes everything locally in your browser, and we've tested it carefully — but no conversion tool handles every PDF perfectly. Always keep your original file and double-check important results before relying on them.