What Base64 is for, and what it is not for

Base64 is encoding, not encryption. It is useful when binary or arbitrary text has to move through text-only channels, and it is also useful for checking whether an opaque string is just encoded data.

Useful scenarios

• Checking whether a payload is Base64-encoded.
• Working with Basic Auth, Data URLs, or email payloads.
• Verifying that encode and decode steps match during API integration.

The most common misconception

Base64 does not hide data in a security sense. Anyone can decode it easily. It solves transport compatibility, not confidentiality.

Hello World
↕
SGVsbG8gV29ybGQ=

Operational notes

• Base64 increases payload size.
• Some systems use standard Base64 while others use URL-safe Base64.
• If decoded text looks broken, check the original character encoding.