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Base64 Encoding and Decoding: Complete Developer Guide
Master Base64 encoding and decoding with practical examples. Learn when to use it, common pitfalls, and best practices for handling binary data.
CSS to Base64 Converter
Convert CSS files to Base64 data URLs for embedding in HTML and web applications
CSS Upload
Input
Drag & drop your file here
or
Supported formats: CSS files
Maximum file size: 10MB
Base64 Data URL
Output
What is CSS to Base64 Converter?
Convert CSS stylesheet files to Base64 data URLs for embedding directly in HTML. This is useful for creating self-contained HTML documents, email templates, or single-file web applications where you want to inline all styles. The tool generates a data URL with the data:text/css;base64,... prefix that can be used in <link> tags or style imports.
How to Use
1
Upload a CSS file
2
The tool automatically converts it to Base64
3
Copy the Base64 data URL output
4
Use it in HTML: <link rel='stylesheet' href='data:text/css;base64,...'>
5
Or decode and inline the CSS in <style> tags
Common Use Cases
Create self-contained HTML documents with embedded styles
Build single-file web applications
Embed CSS in HTML email templates
Package web components with inline styles
Share HTML prototypes without external CSS files
Store CSS in JSON configuration files
Key Features
Optimized for CSS file conversion
Generates valid data
text/css;base64,... URLs
Fast browser-based conversion (no upload required)
One-click copy to clipboard
Perfect for self-contained HTML documents
Privacy-first
files stay on your device
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