Hex Decoder

Convert hexadecimal strings back into their original text or binary data.

Hex Decoder

Convert hexadecimal bytes back to UTF-8 text.

Hex Input

Decoded Text

About Hex Decoding

Hex decoding converts hexadecimal bytes back to UTF-8 text.

Input requirements:

Only hex characters: 0-9, A-F (case insensitive)
Even length (each byte = 2 hex chars)
Must represent valid UTF-8 bytes
Whitespace is automatically removed

What is Hex Decoding?

Hex decoding is the reverse process of hex encoding — it reads each pair of hexadecimal characters and converts them back into the original byte value. The decoder expects an even number of valid hex characters (0–9, A–F, a–f), and produces exactly half as many bytes as input characters.

This operation is fundamental when working with cryptographic outputs, binary protocol responses, or any system that serialises raw bytes as hex strings.

Common Use Cases

Hash Verification: Decode a hex-encoded hash to its raw bytes before comparing with a computed digest in security checks. Protocol Debugging: Convert hex-encoded network payloads back to binary to inspect message structure and field values. Key and Certificate Handling: Cryptographic keys are often stored or transmitted as hex strings and must be decoded to raw bytes before use. Database Blob Recovery: Retrieve and decode hex-encoded binary fields stored in databases or log files.

Tips

Strip any 0x prefix and whitespace before decoding; they are not part of the hex data and will cause parse errors. An odd number of hex characters is always invalid — if you encounter one, check for a missing leading zero (e.g., F should be 0F). After decoding, interpret the resulting bytes according to the correct encoding (UTF-8, Latin-1, etc.) to render text correctly.