Base32 Encode / Decode - Free Online Base32 Tool

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What Is Base32 Encoding?

Base32 is a binary-to-text encoding scheme defined in RFC 4648. It uses a 32-character alphabet (A–Z and 2–7) to represent binary data as printable ASCII text. Unlike Base64, Base32 output is case-insensitive and avoids characters that look similar (0/O, 1/l/I), making it ideal for human-readable tokens, TOTP secrets, and file names.

How to Use

Paste your text (to encode) or Base32 string (to decode) into the input area.
Click Encode to convert text → Base32, or Decode to convert Base32 → text.
Copy the result with the Copy button.

Features

Implements RFC 4648 standard Base32 alphabet (A–Z, 2–7).
Handles UTF-8 text including emoji and international characters.
Decode is case-insensitive and strips padding automatically.
Runs entirely in your browser — no data is uploaded anywhere.

FAQ

What is the difference between Base32 and Base64?

Base64 uses 64 characters (A–Z, a–z, 0–9, +, /) and is more compact. Base32 uses only 32 uppercase letters and digits 2–7, producing ~20% larger output but being case-insensitive and safe for file names and URLs without encoding.

Where is Base32 commonly used?

Base32 is widely used for TOTP / HOTP secret keys (Google Authenticator), Bitcoin addresses (Bech32 variant), and anywhere a human-readable, case-insensitive encoding is needed.

Is my data safe?

All encoding and decoding happens locally in your browser. No data is sent to any server.