What characters are valid in Base32?

RFC 4648 Base32 uses the uppercase letters A through Z and the digits 2 through 7. The '=' character is used for padding to make the string length a multiple of 8. Lowercase input is accepted and converted automatically.

Is the conversion done on my device?

Yes. The entire decoding and hex-encoding process runs in JavaScript inside your browser. No data is sent to any server.

Why does my input show an error?

The input must contain only the characters A–Z, 2–7, and optionally '=' padding. Any other character — including 0, 1, 8, or 9 — is invalid in standard Base32.

Does it matter if padding (=) is missing?

This tool accepts both padded and unpadded Base32. Missing padding is handled automatically by the decoder.

What is the difference between Base32 and Base64?

Base32 uses a 32-character alphabet (A–Z, 2–7) and encodes 5 bits per character, while Base64 uses a 64-character alphabet and encodes 6 bits per character. Base32 produces longer output but is case-insensitive and avoids ambiguous characters.

Base32 to Hexadecimal Converter

Name: Base32 to Hexadecimal Converter
Availability: InStock
Author: Nham Vu

Paste a Base32 string and instantly see its hexadecimal equivalent — decoded byte-for-byte in your browser.

Base32 Input

Uppercase hex output Space-separated bytes

Hexadecimal Output

Enter a Base32 string and click Convert

Base32 Alphabet Reference (RFC 4648)

Value	Char	Value	Char	Value	Char	Value	Char

Summary

Paste a Base32 string and instantly see its hexadecimal equivalent — decoded byte-for-byte in your browser.

How it works

Paste or type your Base32-encoded string into the input field.
The tool strips whitespace and normalizes the string to uppercase.
Each Base32 character is mapped to its 5-bit value per RFC 4648.
The 5-bit groups are packed into bytes (8 bits each).
Each byte is formatted as a two-digit lowercase hexadecimal value.
The result updates instantly — copy it with one click.

Use cases

Inspect TOTP / 2FA secret keys stored in Base32.
Debug encoding pipelines that mix Base32 and hex representations.
Convert cryptographic keys or tokens between encoding formats.
Verify that a Base32 value decodes to an expected byte sequence.
Educational exploration of how Base32 encoding works.
Cross-check outputs from CLI tools like base32 and xxd.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu