Free Base64 Encoder & Decoder
Encode and decode Base64 text and files instantly. Perfect for web development, API testing, and data transmission.
Try these examples:
Base64 Encoded
Length: 0 characters
Decoded Output
Length: 0 characters
What is Base64 Encoding?
Base64 is a method to encode binary data into text format using only 64 ASCII characters. It's commonly used in web development for embedding images, sending binary data over text-based protocols, and data storage.
Common Uses:
- Embedding images in HTML/CSS (data URLs)
- Email attachments (MIME encoding)
- API authentication tokens
- Storing binary data in JSON
- URL-safe data transmission
Base64 Characteristics:
- Character Set: A-Z, a-z, 0-9, +, /
- Padding: Uses = for padding when needed
- Size Increase: ~33% larger than original
- Text Safe: Only printable ASCII characters
- Reversible: Can be decoded back to original
File Types Supported:
- Images (JPG, PNG, GIF, SVG)
- Documents (PDF, DOC, TXT)
- Audio/Video files
- Any binary file format
Base64 Examples
Text Examples
Text: "Hello"
Base64: SGVsbG8=
Text: "123"
Base64: MTIz
Use Cases
- • Data URLs: data:image/png;base64,...
- • JWT tokens for authentication
- • Email attachment encoding
- • Binary data in JSON APIs
- • CSS background images
- • Basic HTTP authentication
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