Base32 encodes binary data using a 32-character alphabet (A–Z plus 2–7) with padding to a multiple of 8 characters. It is used in TOTP authenticator secrets (Google Authenticator, Authy), DNS labels, and some checksums because it avoids ambiguous characters like 0/O and 1/I/l.

Does my data leave my device?

No. The Base32 encoding and decoding is implemented in pure JavaScript and runs entirely in your browser.

Does it work on mobile?

Yes. The tool works in any modern mobile browser and is optimised for touch use.

Base32 Encoder / Decoder

Encode and decode text using Base32 (RFC 4648) — used in TOTP authenticators and DNS labels.

How to use

Paste your text into the input box.
Click "Encode → Base32" to encode, or "Decode ← Base32" to decode.
Copy the result with the Copy button.

Related tools

Hex ↔ ASCII — hexadecimal conversion
Binary ↔ Text — 8-bit binary groups
Base64 Encoder — standard binary-to-text encoding

More ways to use this tool

Base32 Encoder — encode text as Base32 online
Base32 Decoder — decode Base32 strings
TOTP Secret Encoder — Base32 for authenticator apps

Frequently Asked Questions

What is Base32?: Base32 encodes binary data using a 32-character alphabet (A–Z plus 2–7) with padding to a multiple of 8 characters. It is used in TOTP authenticator secrets (Google Authenticator, Authy), DNS labels, and some checksums because it avoids ambiguous characters like 0/O and 1/I/l.
Does my data leave my device?: No. The Base32 encoding and decoding is implemented in pure JavaScript and runs entirely in your browser.
Does it work on mobile?: Yes. The tool works in any modern mobile browser and is optimised for touch use.

Last updated: 2026-05-20 By jarvisbox