# Base32 Encoder & Decoder

> Encode and decode Base32 (RFC 4648) — used by TOTP secrets and case-insensitive identifiers.

To encode Base32, paste your text and the RFC 4648 encoded string appears. Base32 uses only uppercase letters and digits 2 to 7, making it case-insensitive and safe to read aloud or type by hand — which is why TOTP two-factor secrets use it.

**URL:** https://convertto.tech/t/base32-encode-decode
**Category:** Encoders & Decoders (https://convertto.tech/c/encoding-tools)
**Privacy:** Runs entirely in the browser; no upload
**Cost:** Free, no sign-up
**Last updated:** 2026-08-01

## Key facts

- **Privacy:** Runs entirely in your browser — nothing is uploaded
- **Cost:** Free, unlimited, no sign-up

## How to use

1. Enter or paste your text or base32.
2. Choose the direction.
3. The result appears immediately — copy or download it.

## FAQ

### Where is Base32 used?

TOTP authenticator secrets, Tor addresses and some DNS records. Its alphabet excludes easily confused characters and is case-insensitive, which makes it safe to type by hand and to put in a case-insensitive system like DNS.

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