Image to Base64 data URI converter
Turn a small image into a data URI you can paste into HTML or CSS. Choose the image format first and check how long the result is.
Runs in your browser — your input is not uploaded to ToolsNow.
Your files are processed locally in your browser and are not uploaded to ToolsNow.
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Base64 adds about a third to the encoded file size. It can be useful for small embedded images; separate image files can be cached independently.
How to use
- Choose an image. The tool redraws it before encoding, so this is not a byte-for-byte copy of the source file.
- Set Output format. Use PNG for transparency or adjust JPEG/WebP quality to reduce size. Check the preview.
- Copy the result. Use Copy data URI, or select the prepared CSS or HTML text. Add useful alt text if you use the HTML snippet.
Questions
When is a data URI useful?
It can be handy for a tiny icon or a self-contained HTML example. For larger pictures, a separate image file is usually easier to cache, replace and share. Some apps and content-security policies reject data URIs, so check the destination.
Why is the text so large?
Base64 adds roughly a third to the encoded image’s byte size, plus a short format prefix. The size of the image after conversion matters more than the original file size.
Does Base64 hide the image?
No. It is an encoding, not encryption: anyone with the string can recover the encoded picture. Conversion happens in your browser, but sharing the HTML or CSS also shares the image.
Does an SVG stay editable?
No. This tool draws the image as pixels before encoding it. Keep the SVG source if you need vector shapes or editable text.
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