Base64 Encoding for Email
Learn how Base64 encoding works for email attachments. Understand MIME encoding and how to embed images in HTML emails using Base64.
Email systems use Base64 encoding to safely transmit binary data like images and attachments through text-based protocols.
How Email Uses Base64
MIME (Multipurpose Internet Mail Extensions) uses Base64 to encode binary attachments into ASCII text, ensuring safe transmission across email servers.
Inline Images in HTML Emails
You can embed images directly in HTML emails using Base64 data URIs. This ensures images display immediately without relying on external image hosting.
Size Considerations
Base64 encoding increases data size by ~33%. For email, keep inline images small to avoid deliverability issues and slow loading times.
Summary
Understanding Base64 encoding is essential for email development. Use our Base64 encoder/decoder to test and debug your email content.