Base64 Explained: Encoding vs Encryption

Base64 appears in APIs, email formats, data URLs, authorization headers, and many developer workflows. It is frequently misunderstood as a security mechanism.

Base64 is encoding

Base64 represents bytes using a limited text alphabet. The original bytes can be recovered from the encoded value.

It is not encryption

There is no secret key required to decode ordinary Base64. Never use Base64 as a way to protect passwords, tokens, or confidential information.

Padding and variants

Standard Base64 may use `=` padding. URL-safe Base64 uses different characters for some positions and may omit padding depending on the protocol.

Use the encoder for representation tasks

The Base64 Encoder/Decoder is useful for inspecting and converting text representations during development.

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