Convert an image to Base64 embed it right in your code
Encode an image to a Base64/data URI string for HTML, CSS or JSON — or decode one back into an image. 100% browser-side, no upload.
Why choose TaoClip Image to Base64?
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Total privacy
100% local processing — images and code are never uploaded.
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Encode & Decode
Both directions: image → Base64 and Base64 → image, in one tool.
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Prefix option
Toggle the data: URI prefix on or off depending on where you use the code.
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Quick copy
Copy the whole Base64 string to the clipboard in one click.
How to convert an image to Base64 online — free
Encode: upload an image, the tool generates the Base64 string with a data: URI prefix, copy it in one click.
Decode: switch to the "Base64 → Image" tab, paste the encoded string, then click Decode to preview and download the image.
The tool runs directly in your browser via the FileReader API, so there is no install and your data is
never uploaded to a server. Handy for developers embedding small icons in CSS/HTML, self-contained HTML
emails, or quickly testing an image in code without hosting a separate file.
Frequently asked questions
What is a Base64 image string used for?
A Base64 string lets you embed an image directly into code (HTML <img src="data:...">, CSS background-image, JSON) without a separate image file — handy for small icons, HTML emails, or offline demos.
What is the data URI prefix?
It is the "data:image/png;base64," part before the encoded string, telling the browser what image format this is. You can turn off "Include prefix" if you only need the raw Base64 code.
Why shouldn't I use Base64 for large images?
Base64 increases data size by about 33% over the original file, and the browser cannot cache an embedded image separately — best used only for small images (icons, logos) under a few dozen KB.
Can I decode a Base64 string back into an image?
Yes. Switch to the "Base64 → Image" tab, paste the encoded string (with or without the data:image/... prefix), then click Decode to preview and download the image.