How to use the Reverse Hex Digits
- Enter or paste your input in the box (or set the options, if the tool needs no input).
- Adjust the options to match what you need — the result updates as you type.
- Copy the result or download it, and keep editing if you want a different outcome.
What does this tool do?
Flips the nibbles of each hex value: 1A2B becomes B2A1. It is useful when exploring byte order or checking puzzles. Every run of hex digits is reversed on its own and prefixes are left alone.
Everything runs in your browser, so nothing you enter is uploaded or stored.
Why use it?
- Free, with no sign-up and no limits.
- Instant results as you type.
- Private — your data stays on your device.
Example
Input: 0x1A2B3C
Result: 0xC3B2A1
Privacy
Everything you type is processed in your browser. Nothing you enter is sent to our servers or stored by us. There's no account to create and nothing to install.
Frequently asked questions
Is this the same as swapping byte order?
No. Byte order swaps pairs of digits; this reverses every single digit.
Is the Reverse Hex Digits free to use?
Yes. It is free, needs no account and has no daily limit.
Last reviewed by the M2Toolkit team.