What is Base64 Encoding?
Base64 is a method of encoding binary data into a text-based format using 64 characters (A–Z, a–z, 0–9, +, and /). It is widely used for transmitting data over text-only protocols like JSON, XML, or email.
Why Use Base64?
- Embed images, audio, or video directly in HTML or CSS files.
- Safely transmit binary data in systems that only handle text.
- Store small configuration files or documents in databases.
Base64 Examples
Text: Hello
Encoded: SGVsbG8=
Advantages & Limitations
Base64 encoding is simple and reliable, but it increases the data size by ~33%. For large files, direct binary transfer is more efficient.
Common Uses of Base64
- Email attachments (MIME format).
- Embedding images and icons in web pages.
- Storing cryptographic keys and certificates.
Tip: Use Base64 encoding for transport and embedding, but avoid using it as permanent storage for large files.