Image to Base64
Turn image files into Base64 strings for embeds, APIs, and quick previews.
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Quick Tip
Select the image you want to encode.
About This Tool
Why use Image to Base64?
Turn an image into a Base64 data URL you can paste directly into code. The file is read and encoded in the browser, producing a complete string that starts with the correct MIME type — data:image/png;base64, and then the data — ready to drop into an img tag, a CSS background or a JSON payload.
Embedding an image this way removes an HTTP request, which is why it is worth doing for small assets: icons, a logo in an email template, a placeholder, a sprite that has to survive being copied between environments. Base64 costs about 33 per cent in size over the binary file, so it stops being a good trade somewhere around a few kilobytes. Large images are better left as files the browser can cache separately.
Key Benefits
A complete data URL
You get the full string including the data:image/...;base64, prefix, so it works as-is rather than needing the header added by hand.
One-click copy
Base64 strings are long and easy to truncate when selecting manually; the copy button takes the whole thing.
Encoded in your browser
The file is read locally, so assets you have not published yet are not uploaded anywhere.
How to use Image to Base64
- 1
Select the image you want to encode.
- 2
The Base64 data URL is generated immediately, with the MIME type already set.
- 3
Copy the whole string in one click.
- 4
Paste it into an img src, a CSS url(), or wherever the data URL is needed.
Best use cases
Embed a small icon in HTML or CSS to avoid an extra request.
Put a logo inside an email template that must render without external images.
Include an image in a JSON payload or an API request.
Inline a placeholder image in a self-contained demo or test.
Image to Base64 FAQs
How large should an image be before Base64 stops making sense?
Roughly a few kilobytes. Base64 adds about 33 per cent to the size and the data cannot be cached separately from the page, so bigger images are better served as ordinary files.
Do I need to add the data:image prefix myself?
No. The output is a complete data URL with the correct MIME type already in place, so it works directly in an img src or a CSS url().
Does encoding change the image?
No. Base64 is a reversible text representation of the exact same bytes. Decoding gives you a byte-for-byte identical file.
Which formats can I encode?
Any image the browser can read — PNG, JPG, GIF, WebP and SVG all work, and the MIME type in the output follows the file you chose.
Related Images Tools
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