•8 min read
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.
File to Base64 Encode
Encode any file to Base64 data URL format for web development and APIs
File Upload
Input
Drag & drop your file here
or
Supported formats: All file types supported
Maximum file size: 10MB
Base64 Data URL
Output
What is File to Base64 Encode?
Encode any file to Base64 data URL format for use in web development, APIs, and data transmission. This tool converts binary files into text-based Base64 strings with proper MIME type prefixes, making them suitable for embedding in HTML, CSS, JSON, and API payloads. All encoding happens locally in your browser for complete privacy.
How to Use
1
Upload any file (images, documents, web assets, etc.)
2
The tool automatically encodes it to Base64
3
Copy the Base64 data URL output
4
Use it in your web application, API, or data payload
5
The output includes the correct MIME type prefix
Common Use Cases
Encode files for API transmission
Embed files in JSON payloads
Create data URLs for HTML and CSS
Store file data in databases as text
Build offline-first web applications
Package files with web components
Key Features
Supports all file types
Generates valid Base64 data URLs with MIME types
Fast browser-based encoding (no upload required)
One-click copy to clipboard
Perfect for web development and APIs
Privacy-first
files stay on your device
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