Understanding Base64 Encoding
Base64 is a group of binary-to-text encoding schemes that represent binary data (like images or files) in an ASCII string format by translating it into a radix-64 representation. It is commonly used when there is a need to encode binary data that needs to be stored and transferred over media that are designed to deal with textual data.
Common Use Cases
- Email Attachments: Sending images or files via MIME (Multipurpose Internet Mail Extensions).
- Data URIs: Embedding small images directly into HTML or CSS files to reduce HTTP requests.
- APIs: Transmitting binary data in JSON or XML payloads.
- Basic Obfuscation: Hiding data from casual glancing (though NOT secure encryption).
Frequently Asked Questions
Is Base64 secure?
No. Base64 is an encoding scheme, not encryption. Anyone can decode a Base64 string back to its original form. Do not use it to store passwords or sensitive secrets without proper encryption.
Does encoding increase file size?
Yes. Base64 encoding typically increases the data size by approximately 33%. For very large files, this overhead can be significant.