Image to Data URI Online — Free & Private | Onbox Tools | Onbox Tools

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Professional Image to Data URI Converter

Fast and secure image to data uri converter to transform binary images into Base64 strings. Our generator creates ready-to-use Data URIs for CSS background-images or HTML img tags instantly. Convert image to data uri online with 100% browser-side privacy.

Source Image

Import

Drag & Drop Image

Data URI Result

Converter controls

CSS Wrapper

Wrap output in background-image: url() property.

HTML Wrapper

Wrap output in <img src=""> tag.

Original Size0.00 KB

Encoded Length0 Chars

MIME TypeN/A

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Data URI Generator FAQ

Is image to data uri conversion safe?

Yes. Our image to data uri converter works 100% locally. Your image to base64 online data is never sent to a server.

Does Data URI increase file size?

Yes, encoding an image to base64 increases the string length by roughly 33% compared to the original binary file.

What formats are supported?

We support all web-standard formats including PNG, JPG, JPEG, GIF, WebP, and SVG for base64 image online conversion.

Can I use Data URI in CSS?

Absolutely. Use the CSS Wrapper option to generate a string ready for your background-image properties.

Are there string length limits?

Browsers have high limits, but large base64 encode image strings can slow down page rendering. Keep them small.

Is this tool free to use?

Yes, our image to data uri converter online is completely free with no usage caps or watermarks.