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Base32 Encode / Decode

Encode and decode RFC 4648 Base32, Base32hex, and Crockford Base32. Live conversion, optional padding, byte stats, and hex view.

PrivateIn your browserInstantUnlimited

10 characters

16 characters · 10 bytes

How it works

1

Choose encode or decode

Encode turns UTF-8 text into Base32. Decode reverses Base32 (spaces and hyphens ignored) back to text.

2

Pick an alphabet

Standard is RFC 4648 (A–Z, 2–7). Hex is Base32hex (0–9, A–V). Crockford avoids I, L, O, U and treats I/L/O as 1/1/0 when decoding.

3

Copy, download, or inspect

Optional padding adds = so the length is a multiple of 8 (not used for Crockford). On decode, hex shows raw bytes.

What is Base32?

Base32 represents binary data using a 32-character alphabet. Compared with Base64 it is longer but easier to type and often case-insensitive. This tool supports RFC 4648 standard and hex alphabets plus Crockford Base32, all in your browser.

Why use this tool

  • RFC 4648 Base32 encode and decode
  • Base32hex and Crockford alphabets
  • Optional padding
  • Live mode, swap, and sample
  • Byte stats and hex of decoded data
  • Unlimited use — no daily cap

Questions

What does Base32 Encode / Decode do?

It converts UTF-8 text to Base32 and back. Base32 is often used for secrets (TOTP), case-insensitive tokens, and human-typed codes.

Standard vs Hex vs Crockford?

Standard uses A–Z and 2–7. Hex uses 0–9 and A–V. Crockford uses a typo-resistant alphabet without I, L, O, or U.

Why is Base32 used for TOTP?

Authenticator apps commonly store shared secrets as Base32. Encoding is case-insensitive and avoids some ambiguous characters.

Is my text sent to a server?

No. Encoding and decoding run entirely in this tab.

Is there a daily limit?

No. This tool has no daily cap.

Do I need an account?

No. Open the page and use it.

Does it work on a phone?

Yes. It runs in the mobile browser.

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Tools stay free in your browser. One-time thanks via Kreosus. Turkish cards work.

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