Developer Tools

Image to Base64 Data URI Converter

Convert image files to Base64 data URIs with copy-to-clipboard for HTML img tags, CSS background URLs, or raw strings.

100% free
Files stay on your device
No sign-up, no watermark

Supports PNG, JPG, WebP, SVG, GIF, BMP (Converts to Data URI locally)

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What is Image to Base64 Data URI Converter?

Image to Base64 encodes an image file as Base64 text so it can be embedded directly in HTML, CSS, JSON or email templates without a separate file request. After choosing an image you get four ready-to-copy formats: the full data URI, the raw Base64 string, an HTML <img> tag and a CSS background-image declaration, plus a preview with the image’s dimensions and size. Base64 is about 33% larger than the original file, so it is best for small icons and logos.

How to use Image to Base64 Data URI Converter

1
Choose an image
Select a PNG, JPG, WEBP, GIF, SVG or BMP file.
2
Pick the output format
Copy the data URI, raw Base64, <img> tag or CSS background snippet.
3
Paste it into your code
Embed the snippet in your HTML, stylesheet or JSON.

Frequently asked questions

Why is the Base64 text bigger than my image?

Base64 represents every 3 bytes with 4 characters, so encoded images are about 33% larger. Use it for small assets only.

When should I embed images as Base64?

For small icons, email signatures, or single-file HTML where avoiding an extra HTTP request matters. Large photos are better served as normal files.

Is my image uploaded?

No. The file is read with the FileReader API on your device.

Last updated: October 13, 2026