Question 1

What is Base64 encoding used for?

Accepted Answer

Base64 converts binary to text-safe ASCII for email attachments, data URIs in HTML/CSS, storing binary in JSON/XML, and basic obfuscation (not encryption). Increases size by ~33%.

Question 2

Is Base64 secure for passwords?

Accepted Answer

No! Base64 is encoding, not encryption. Anyone can decode it instantly. Never use Base64 for security. Use proper hashing (bcrypt, Argon2) for passwords and AES/RSA for encryption.

Question 3

What character encoding should I use?

Accepted Answer

UTF-8 is the modern standard - it handles all characters and is backward-compatible with ASCII. Use it unless you have specific legacy requirements.

Question 4

Will encoding/decoding change my data?

Accepted Answer

Proper encoding is reversible. However, using wrong encoding can corrupt special characters. Always use the same encoding for encode and decode.

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