Base32 Encoder & Decoder

This tool encodes text into Base32 and decodes Base32 back into readable text, using the standard RFC 4648 alphabet. Base32 represents binary data using 32 characters, the uppercase letters A to Z and the digits 2 to 7, which makes it more compact than writing out raw binary but, unlike Base64, avoids characters that are easily confused or that cause problems in case-insensitive systems. That robustness is why Base32 is chosen in places where humans read or type the codes, or where case does not survive: it encodes the secret keys behind two-factor authentication apps, appears in some file-sharing and onion addresses, and is used wherever a compact, unambiguous, case-insensitive encoding is needed. This tool handles both directions. You paste your text and choose to encode or decode, and the calculator converts it instantly: encoding turns your text into a Base32 string of letters and digits, while decoding turns a Base32 string back into the original text. It works through UTF-8, so accented characters, macrons and emoji encode and decode correctly. Everything runs in your browser and nothing is uploaded, which matters for sensitive values like authentication keys. The results update as you type. Use it to inspect or generate Base32 data, to work with two-factor authentication secrets, to learn how the encoding works, or for development and debugging. The encoding groups the data into five-bit chunks, since thirty-two is two to the fifth, mapping each to one alphabet character, and pads the end with equals signs so the length is a multiple of eight. A key point: Base32 is an encoding, not encryption, so it offers no security on its own; anyone can decode it. It simply provides a safe, readable way to represent binary data as text.

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RFC 4648 alphabet (A-Z, 2-7). Handles full Unicode via UTF-8. Base32 is an encoding, not encryption, and offers no security. Runs entirely in your browser.