Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 back to readable text. Essential tool for developers working with data encoding and web protocols.
Base64 Encoder
Base64 Examples
Encoding Examples
Hello World!SGVsbG8gV29ybGQhuser:passworddXNlcjpwYXNzd29yZA==Common Use Cases
- HTTP Basic Authentication headers
- Email attachments (MIME encoding)
- Data URLs (images, fonts)
- JSON Web Tokens (JWT)
- Binary data transmission
Important Notes
- • Base64 encoding increases data size by ~33%
- • Not suitable for encryption (encoding ≠ encryption)
- • Commonly used for safe text transmission of binary data
- • Padding characters (=) may appear at the end
About Base64 Encoding
What is Base64?
Base64 is a binary-to-text encoding scheme that represents binary data in sequences of 24 bits that can be represented by four 6-bit Base64 digits. It's commonly used when there's a need to transmit binary data over channels that are designed to handle textual data.
The encoding uses 64 different ASCII characters: A-Z, a-z, 0-9, +, and /.
Why Use Base64?
Base64 encoding ensures that binary data remains intact during transport across systems that might not handle raw binary data correctly. It's particularly useful for:
- • Email attachments (MIME encoding)
- • Data URLs in web pages
- • HTTP Basic Authentication
- • JSON data transmission
Security & Privacy
Client-Side Processing
All encoding and decoding is performed entirely in your browser. Your data never leaves your device, ensuring complete privacy and security.
Not Encryption
Important: Base64 is encoding, not encryption. It's easily reversible and should not be used to hide sensitive information. Use proper encryption methods for security purposes.