Base32 to Hex Converter: Encode and Decode Online Base32 is one of several base 32 transfer encodings. Base32 uses a 32-character set comprising the twenty-six upper-case letters A–Z, and the digits 2–7. Base32 is primarily used to encode binary data, but Base32 is also able to encode binary text like ASCII. Use this tool to convert base32 to hexadecimal format. If this tool was helpful, tweet it or share it.