Base32 Encoder/Decoder

Yes, all processing happens 100% client-side in your browser. Your data is never sent to any server.

Base32 is commonly used for OTP (One-Time Password) apps like Google Authenticator, where the encoded strings need to be human-readable.

Yes, this Base32 encoder/decoder is completely free to use.

Base32 uses the characters A-Z (uppercase letters) and 2-7 (digits). The characters 0, 1, 8, and 9 are excluded to avoid confusion with similar-looking letters. Padding is done with the equals sign (=).

Base32 uses a 32-character alphabet (A-Z, 2-7) instead of Base64’s 64-character set. Base32 is more human-readable and case-insensitive, making it ideal for manual entry (like OTP codes), while Base64 is more space-efficient for storage and transmission.

Yes, this tool automatically handles Base32 strings with or without padding (= characters). The padding is optional for decoding but helps maintain proper alignment.

If you try to decode text containing invalid characters (anything other than A-Z and 2-7), the tool will show an error message asking you to use only valid Base32 characters.

Yes, you can encode any Unicode text (including emojis and non-Latin scripts). The encoder converts all characters to UTF-8 bytes before Base32 encoding, and the decoder reverses this process.

Yes! Google Authenticator and similar OTP apps use Base32 encoding for their secret keys. You can decode existing secrets or encode new ones using this tool.

Yes, once the page loads, all Base32 encoding and decoding happens locally in your browser using JavaScript. No internet connection is needed after the initial page load.