Free Online Base32 Encoder/Decoder

Base32 is ideal for 2FA/TOTP secrets because it is case-insensitive and avoids ambiguous characters. Users can easily type the secret manually if they cannot scan the QR code, without worrying about uppercase/lowercase or confusing 0 with O.

Base32 uses 32 characters and is case-insensitive with 60% size overhead. Base64 uses 64 characters, is case-sensitive, and has only 33% overhead. Base32 is more human-readable; Base64 is more space-efficient.

These digits are excluded because they can be confused with letters: 0 looks like O, 1 looks like I or L, 8 looks like B, and 9 can look like g. This prevents transcription errors when humans type encoded strings.

Yes! Google Authenticator and similar TOTP apps use Base32-encoded secrets. You can encode a secret to share with users or decode existing secrets for backup purposes.

Crockford Base32 is a variant that uses 0-9 and A-Z (excluding I, L, O, U) with additional error-correction features. It can detect common transcription errors. Our tool uses standard RFC 4648 Base32.

No, Base32 is encoding, not encryption. It provides no security - anyone can decode Base32 data instantly. For security, use proper encryption before encoding.