Reverse Hex (Byte Order)
Reverse the byte order of a hex string (endianness swap).
Converters Runs in your browser
What does reversing hex do?
Little-endian systems store the least significant byte first, so the value you read in a memory dump often looks backwards. This tool flips it: “12ab34” becomes “34ab12”, whole bytes reversed while each two-digit pair stays intact. Spaces and 0x prefixes get stripped before grouping. Run it again and you’re back to the original, which makes quick endianness checks painless.
How to use the Reverse Hex
- 1 Paste the hex value that needs its byte order flipped.
- 2 Digits pair into bytes, then the byte sequence reverses.
- 3 Verify the first byte of the output matches the last byte of the input.
- 4 Copy the swapped value.
What you can use it for
- Switching between big- and little-endian hex.
- Fixing byte order in memory dumps.
- Reverse-engineering binary formats.
- Preparing hex for a specific architecture.
Frequently asked questions
Does it reverse digits or bytes?
Bytes. “12ab” becomes “ab12”, not “ba21”. Reversing individual digits would scramble the value instead of changing its endianness.
What is endianness?
The byte-storage order of a multi-byte number. x86 CPUs are little-endian, most network protocols are big-endian, and converting between them is exactly this byte reversal.
Should I reverse a whole memory dump at once?
No, reverse one value at a time. Flipping an entire dump would also swap the order of the values themselves, not just the bytes within each value.
Related tools
More Converters
More tools like this:
All Converters