Three terms that get mixed up constantly. A developer who confuses them will choose the wrong tool — storing passwords with encryption instead of hashing, or using Base64 where they need AES. This post untangles all three.

The Short Answer

Reversible? Requires a key? Common use

Encoding Yes No Transmission (Base64, URL encoding)

Encryption Yes Yes Securing data (AES, RSA, TLS)

Hashing No No Verification (passwords, checksums)

Encoding: Change the Format, Not the Meaning

Encoding transforms data into a different format so it can travel through a system that only accepts a specific character set. It is purely cosmetic — it changes how the data looks, not what it means.

Base64 is the most common encoding. It takes binary data and represents it using only 64 printable ASCII characters (A–Z, a–z, 0–9, +, /).…