Base32 Encoder Decoder
Encode text to Base32 or decode Base32 back to readable text locally.
Text-safe encoding with Base32
Base32 represents binary data using a limited, case-insensitive alphabet, which makes it useful where Base64 is awkward — TOTP secrets, some file names, and systems that mangle mixed case. This tool encodes text to Base32 and decodes it back, both directions, in your browser.
Unlike Base64 it avoids characters that get confused or altered by case-insensitive systems, at the cost of slightly longer output. Paste text to encode, or paste Base32 to recover the original, with invalid input handled gracefully rather than throwing.
Padding and privacy
Base32 output is padded with '=' to a multiple of eight characters and is case-insensitive on decode, so TOTP secrets round-trip cleanly. Encoding happens locally and nothing is uploaded.
Frequently asked questions
Which Base32 alphabet does this use?
The standard RFC 4648 alphabet, A to Z and 2 to 7, with = padding to a multiple of 8 characters.
Does it handle non-English text?
Yes. Text is converted to UTF-8 bytes before encoding, so accented letters and emoji round-trip correctly.
Where is Base32 used?
Anywhere a case-insensitive, easy-to-read encoding helps: two-factor authentication secrets, some file systems, and identifiers people type by hand.
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