Developer Tools

Reverse Hex

Reverse the byte order of hex strings. Convert between big-endian and little-endian formats.

Uppercase output

Hex Input

Reversed Output

How to use the Reverse Hex

Enter hex value

Type or paste a hex string. It must have an even number of hex digits.

Click Reverse

Click the Reverse button to swap the byte order.

Copy result

Click Copy to save the reversed hex string to your clipboard.

About the Reverse Hex Tool

Reverse the byte order of hex strings. Convert between big-endian and little-endian formats. This free online reverse hex from BuildQuill runs entirely in your browser. No data is sent to any server, keeping your information private. No signup or installation needed.

Free to use with no account required
Works in all modern browsers
All processing happens locally in your browser
Part of BuildQuill's developer tools collection

Frequently Asked Questions

What is hex byte reversal?

It reverses the order of bytes (pairs of hex characters) in a hex string. For example, AABBCCDD becomes DDCCBBAA. This is commonly needed when converting between big-endian and little-endian byte orders.

When do I need to reverse hex bytes?

When working with network protocols, binary file formats, or CPU architectures that use different endianness. Intel x86 uses little-endian, while most network protocols use big-endian.

Does this reverse individual characters or byte pairs?

It reverses byte pairs (two hex characters at a time). For example, AB CD EF becomes EF CD AB, not FE DC BA.

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