Base32 Encode – Online Encoder

Convert any text or binary data to Base32 format with our free online tool. Base32 encoding uses the 32-character set A-Z and 2-7, making it safe for case‑insensitive systems, DNS, and secret keys.

How Base32 Works

Base32 takes binary data in groups of 5 bits (32 possible values) and maps each to a character. The input is first converted to bytes (UTF‑8 for text), then split into 5‑bit chunks. If the last group has fewer than 5 bits, padding (=) is added to make the output length a multiple of 8 characters.

Example Encoding

Input text: "Hello"
UTF-8 bytes (hex): 48 65 6c 6c 6f
Base32 encoded: JBSWY3DP
Padding: JBSWY3DP (no padding needed as length multiple of 8)
Input text: "Hi"
UTF-8 bytes: 48 69
Base32 encoded: J5A=====

Code Example

// Python example
import base64
text = "Hello World"
encoded = base64.b32encode(text.encode())
print(encoded)  # b'NBSWY3DPEB3W64TMMQ======'

// JavaScript (Node.js)
const encoded = Buffer.from("Hello World").toString("base32");
console.log(encoded);  // "NBSWY3DPEB3W64TMMQ======"

Advanced Options

• Padding: include or omit trailing '='
• Line wrapping: insert line breaks every 76 characters
• Output case: uppercase (standard) or lowercase
• Input format: text, binary file, or hex string

Use Cases

Base32 is widely used for:

• Google Authenticator / TOTP secret keys
• DNS zone file representations (for binary data)
• Steam IDs and other platform identifiers
• Encoding binary data in QR codes (smaller alphabet reduces density)
• Case‑insensitive environments (e.g., file names on Windows)

Our encoder is fully RFC 4648 compliant. No registration, no watermarks, and all uploads are automatically deleted after 1 hour.