Overview
Introduction
Values read straight out of an x86 or ARM memory dump are almost always little-endian, but a lot of destinations, network protocols, big-endian file formats, and cross-platform data exchange, expect big-endian order instead.
This tool performs exactly that conversion: give it a little-endian hex value and it hands back the equivalent big-endian byte order.
What Is Little Endian Hex to Big Endian Hex Converter?
A directional byte-order converter that assumes your input is little-endian and reverses its bytes to produce the big-endian equivalent.
Under the hood it performs the same byte-reversal as the general Hex Endianness Swapper; this tool exists to make the little-endian-to-big-endian direction explicit in your workflow.
How Little Endian Hex to Big Endian Hex Converter Works
The input is validated as hex digits, left-padded with a single zero if it has an odd digit count so it divides evenly into whole bytes.
The padded value is split into 2-digit bytes and those bytes are reversed end-to-end, converting the assumed little-endian ordering into big-endian.
When To Use Little Endian Hex to Big Endian Hex Converter
Use it right after reading a multi-byte value out of a little-endian system's memory or register dump, when you need to hand that value to something expecting big-endian order.
It's also useful for constructing big-endian packet or file fields by hand from values you already have in native little-endian form.
Often used alongside Big Endian Hex to Little Endian Hex Converter and Hex Endianness Swapper.
Features
Advantages
- Makes the conversion direction explicit, reducing the chance of accidentally swapping the wrong way.
- Works on any length hex value, not just 16-, 32-, or 64-bit sizes.
- Instant and fully client-side.
Limitations
- Doesn't verify your input actually originated from a little-endian source; it simply performs the byte reversal regardless of the true source order.
- Treats the whole input as one contiguous value; split multi-field data into separate values before converting each independently.
Examples
Best Practices & Notes
Best Practices
- Double check the value really is little-endian before converting; running this on an already-big-endian value will produce the wrong result.
- Use the Big Endian → Little Endian converter for the reverse direction rather than reasoning about which way this tool's output should be re-swapped.
Developer Notes
Shares its byte-reversal implementation directly with the Hex Endianness Swapper and the Big Endian → Little Endian converter; byte-order swapping is symmetric, so the same function correctly serves all three directional framings.
Little Endian Hex to Big Endian Hex Converter Use Cases
- Converting a value read from a little-endian memory dump into big-endian for a network packet or file field
- Preparing test vectors that need a specific byte order for protocol or format testing
- Verifying a manually-performed little-endian-to-big-endian conversion
Common Mistakes
- Applying this converter to a value that's already big-endian, which produces an incorrectly re-reversed result.
- Forgetting an odd digit count gets a leading zero added before the byte split, which shifts which digits land in which byte.
Tips
- If you're not sure which direction you're starting from, the general Hex Endianness Swapper performs the identical transform without assuming a direction.
- Byte-order swapping is its own inverse, so running this tool's output back through the Big Endian → Little Endian converter should reproduce your original input.