Base32 Encoder / Decoder

Encode and decode Base32 (RFC 4648) — used for TOTP secrets and authenticator keys.

Mode:

Input: Output:

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How to use

Paste text to encode, or a Base32 string to decode back.

What is Base32 used for?

Authenticator app secrets (TOTP), some API keys and encoding binary data in uppercase letters + digits 2–7.

Why does my TOTP secret fail?

Secrets must be valid Base32 with correct padding; this tool validates and fixes padding on decode.

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