Base64 Encoder Decoder
Convert text to Base64 and decode Base64 to text with support for multiple formats, URL-safe encoding, and data URIs. Perfect for web development and API integration.
Configuration
File Input
Drag and drop a text file here, or click to select
Input Text
Output Base64
Usage Examples
Text to Base64
Input: "Hello World!" → Output: "SGVsbG8gV29ybGQh"
Data URI Format
Perfect for embedding small text files in HTML or CSS
URL-Safe Base64
Replaces +/= with -/_ for safe URL transmission
What is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used in web development, email systems, and APIs to transmit data safely over text-based protocols that may not handle binary data correctly.
Common Use Cases
- API Authentication: Encoding credentials for Basic Authentication headers
- Data URIs: Embedding small images or files directly in HTML and CSS
- Email Attachments: Encoding binary files for MIME email transmission
- Configuration Files: Storing binary data in text-based config files
- URL Parameters: Safely transmitting data in URL query strings
- JSON APIs: Including binary data in JSON responses
Features of Our Base64 Tool
- Bidirectional Conversion: Both encode and decode operations in one tool
- Multiple Output Formats: Plain Base64, Data URIs, CSS, HTML, and JavaScript formats
- URL-Safe Encoding: Support for URL-safe Base64 with character substitution
- File Input Support: Upload text files for batch processing
- Real-time Conversion: Automatic conversion as you type
- Copy & Download: Easy copying to clipboard and file download options
How to Use This Base64 Converter
- Choose Mode: Select either "Encode to Base64" or "Decode from Base64"
- Input Text: Type or paste your text, or upload a text file
- Select Format: Choose your preferred output format (for encoding)
- Configure Options: Enable URL-safe encoding if needed
- Get Results: Copy the result or download it as a file
Base64 Character Set
Base64 uses 64 characters: A-Z, a-z, 0-9, and two additional characters (+ and /) for standard Base64, or (- and _) for URL-safe Base64. Padding is done with the = character.
URL-Safe Base64
URL-safe Base64 replaces + with -, / with _, and removes padding (=) characters. This makes the encoded string safe for use in URLs without percent-encoding.
Security Note
Base64 is an encoding method, not encryption. It provides no security and can be easily decoded. Never use Base64 alone to protect sensitive information - always use proper encryption for security.