Base64 Encoder & Decoder
Encode and decode Base64 strings with support for text, files, and images. URL-safe encoding option available.
Encode text to Base64 or decode Base64 back to text
About Base64:
- • Encodes binary data as text using 64 characters
- • Commonly used for email attachments, images, and data transfer
- • Increases size by ~33%
- • URL-safe variant replaces +/ with -_
Key Features
About Base64 Encoding
Base64 encoding is essential for safely transmitting binary data over text-based protocols like HTTP, email, and JSON. Our Base64 Encoder & Decoder handles all your encoding needs with instant, browser-based processing.
Encode text strings, files, or images to Base64 format for embedding in HTML, CSS, or JSON. Decode Base64 strings back to their original format. Support for URL-safe Base64 makes it perfect for query parameters and URLs.
The tool processes everything locally in your browser, ensuring your data remains private and secure - especially important when working with sensitive files or credentials.
Common Use Cases
- Encoding images for data URIs in HTML/CSS
- Decoding Base64 API responses
- Encoding files for email attachments
- Creating URL-safe encoded strings
- Debugging encoded data in logs
- Embedding binary data in JSON
How to Encode to Base64
- Select "Encode" mode in the tool above
- Paste your text or upload a file to encode
- Enable URL-safe encoding if needed for web use
- Copy the Base64 output or download as a file
Why Use Our Base64 Tool?
- 100% Private: All processing happens in your browser - your data never leaves your device
- No Size Limits: Encode text of any length with instant results
- File Support: Drag and drop files or images for encoding
- URL-Safe Option: Generate URL-safe Base64 for web applications
- No Registration: Use immediately without creating an account