CSS to Base64

What CSS to Base64 does

How to use the Base64.Guru CSS to Base64

1. 1

   Type or paste your CSS code into the "CSS source" input field

2. 2

   Select your preferred output format from the available options

3. 3

   Click the "Encode CSS to Base64" button to process the conversion

4. 4

   Copy the resulting Base64 string from the output field or download the result

CSS to Base64 FAQ

Can I use the encoded Base64 string directly in an HTML style attribute?

Yes, the tool generates output formats including HTML Style and Data URI, which can be pasted into style attributes or <style> tags, though some CSS rules may require additional validation depending on the target environment.

What is the difference between Plain text and Data URI output formats?

Plain text outputs only the Base64-encoded string, while Data URI formats include the prefix "data:text/css;base64," making the result ready to use as a direct stylesheet source in browsers.

Does the tool validate CSS syntax before encoding?

The converter processes whatever CSS code is pasted into the input field; it does not include a validator, so malformed CSS will still produce a Base64 string, but the resulting styles may not render correctly.

Can I encode an entire CSS file using this tool?

Yes, you can paste the full content of a CSS file into the input field; the tool will encode all the contained rules and declarations into a single Base64 string.