Developer / 4 min read

Base64 Encoding Is Not Encryption

Understand what Base64 does, when to use it, and why it should not be treated as a security feature.

What Base64 actually does

Base64 converts data into a text-friendly format. It is commonly used when binary data needs to travel through systems that expect text.

The important detail is that Base64 is reversible by design. Anyone with the encoded string can decode it.

When Base64 is useful

Base64 is useful for small embedded assets, API examples, email attachments, and quick text conversions during debugging.

Use it for compatibility, not secrecy.
Do not store passwords or secrets as Base64 and call them protected.
Use real encryption or hashing for security-sensitive data.

A quick check

If you can paste a string into a free decoder and read the original text, it was never protected. Treat Base64 as a format conversion, not a privacy layer.