Encoding
Common Encoding Mistakes in Web Development
2026-05-24 · 4 min read
The encoding mistakes that still waste time in real apps: Base64 confusion, broken UTF-8, and bad URL escaping.
Encoding is not encryption
Developers still confuse Base64 with secrecy. It only changes representation, not security.
If data must be protected, use proper encryption and key management.
Encode the right part
URL encoding usually applies to parameter values, not the whole request syntax.
Double-encoding is a common reason callbacks and redirects break.
Respect UTF-8
Text that looks fine in ASCII can fail once users send emoji, accented characters, or non-Latin scripts.
Use UTF-8 aware encode and decode flows end to end.