Image to Base64 - Data URL Encoder Free

Upload your image and the tool encodes it as a base64 data URI string you can copy straight into your code.

Yes, free forever with no signup.

Embed small images directly in HTML, CSS, or JSON without separate image files.

Yes. Paste the full data URI into an img src attribute and it renders like a normal image.

No. Encoding happens in your browser, so your images never leave your device.

Paste the full data URL as the background in a CSS rule or into the src attribute of an img tag. The browser decodes the Base64 text and displays the picture without any separate file. This suits small icons, logos and signature images that must travel inside a single file.

Base64 embeds the picture as text, so your page or template becomes one single self-contained file. Developers use it for HTML email assets, embedded documents and JSON payloads where attaching files is awkward. Remember that every recipient receives the embedded image about a third larger than the original file.

Base64 encoding adds roughly 33 percent overhead, so a large image produces a very long string. The format is designed for tiny assets, not for high resolution photos. Compress or resize big images before encoding, or keep large photos as normal linked files instead of embedding them.

Usually the string was truncated during copying, or the data URL prefix was lost when pasting. Copy the complete output, starting with the data scheme and image format, and paste it without line breaks. Also check that the prefix matches your format, because PNG, JPG, WebP and GIF each use their own.

JPG, PNG, WebP and GIF are all supported, and you can copy the encoded output or download it as a text file. Encoding runs locally in your browser, so even screenshots with sensitive content never leave your device. Files up to 100 MB are accepted, although small assets give the most practical results.