Base64 to CSS

Decode Base64 strings back to CSS code with real-time preview.

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Drop your Base64 file here

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Sample Heading (h4)

This is a sample paragraph (p) to see how your CSS affects text elements. You can add classes like .preview-box to your CSS.

What is Base64 to CSS Decoding?

Base64 to CSS decoding is the process of converting a Base64-encoded string back into its original Cascading Style Sheets (CSS) format. This is commonly used when you have a Data URI (starting with data:text/css;base64,) and need to extract the original styles for editing or inspection.

Instant Preview

See your decoded CSS styles applied instantly to sample HTML elements in our sandboxed preview.

Data URI Support

Automatically detects and strips Data URI prefixes like data:text/css;base64, for easy conversion.

100% Client-Side

All decoding happens in your browser. Your data never leaves your computer, ensuring total privacy.

Why Decode Base64 CSS?

  • Debugging: Inspect styles that are embedded as Data URIs in web pages or dynamic scripts.
  • Reverse Engineering: Extract CSS from obfuscated or optimized code snippets.
  • Editing: Convert a static Data URI back into editable CSS code to make changes.
  • Optimization: Check the size and content of your inlined CSS to ensure it's truly efficient.