Base64 Encoder/Decoder
Quickly encode text to Base64 or decode Base64 strings back to readable text. Perfect for developers working with data encoding.
Common Use Cases
- •Encode binary data for transmission
- •Embed images in HTML/CSS
- •Store data in JSON/XML
- •Basic authentication headers
Quick Example
Important Note
Base64 is an encoding method, not encryption. It does not provide security or privacy. Do not use it to protect sensitive information.
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Understanding Base64 Encoding
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used when there's a need to encode binary data, especially when that data needs to be stored and transferred over media designed to deal with text.
How It Works
Base64 encoding converts binary data into a set of 64 different ASCII characters (A-Z, a-z, 0-9, +, /). Every 3 bytes (24 bits) of binary data is converted into 4 Base64 characters. This results in approximately 33% increase in data size.
Common Applications
- Email Attachments: MIME (Multipurpose Internet Mail Extensions) uses Base64 to encode file attachments
- Data URLs: Embedding images or files directly in HTML/CSS using data: URLs
- API Authentication: HTTP Basic Authentication uses Base64 to encode credentials
- JSON/XML: Storing binary data within text-based formats
- Certificates: PEM format certificates are Base64-encoded
Security Note
Base64 is not encryption. It's simply an encoding method. Anyone can decode Base64 strings easily, so never use it to protect sensitive information like passwords or API keys. For security, use proper encryption methods like AES or RSA.