4coders

Base32 Encoder & Decoder

RFC 4648 Base32 encode & decode.

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About this tool

Base32 (RFC 4648) encodes data using 32 characters (A–Z and 2–7). It is case-insensitive and avoids visually similar characters, making it popular for secrets, tokens and keys.

Common use cases

  • Encode or decode TOTP/HOTP secrets for two-factor authentication
  • Work with certain API keys, recovery codes or hardware tokens
  • Use when Base64 symbols (+, /, =) would cause problems in URLs or filenames

Further reading

Related tools

Base64URL / PercentHTML EntitiesHex

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