Little Endian Hex to Decimal Converter
Interpret hex bytes stored in little-endian order and get their decimal value — reverses the byte order first, then converts.
Built by
Swapnil SanghviFull-Stack Web Developer & WordPress Developer
Swapnil Sanghvi is a full-stack web and WordPress developer, UI designer, and full-time freelancer who builds and maintains Hex Calculator.
Further reading: Endianness — Wikipedia
How to Read Little-Endian Hex as Decimal
Reverse the byte order first — since the bytes are stored least-significant-byte-first, reversing them gives the natural, most-significant-byte-first reading order. Then convert that reversed hex value to decimal the normal way.
Little Endian to Decimal Example, Step by Step
78 56 34 12 (little-endian bytes) = 305,419,896
little-endian bytes 78 56 34 12 -> decimal 305,419,896
Stored bytes: 78 56 34 12 Reversed: 12 34 56 78 0x12345678 = 305,419,896
| Step | Description | Result |
|---|---|---|
| Reverse the byte order | 78 56 34 12 -> 12 34 56 78 | 0x12345678 |
| Convert to decimal | standard hex-to-decimal conversion | 305,419,896 |
If you instead read 78563412 directly as a plain hex number (without reversing), you'd get a completely different, incorrect decimal value — 2,018,915,346.
Where This Actually Comes Up
Reading a Value From a Raw Memory Dump
Memory dumps from x86 or ARM systems store multi-byte integers little-endian — converting the raw bytes to a readable decimal number requires this reverse-then-convert step.
debugger memory view -> actual integer value
Decoding a Little-Endian Binary File Field
Many binary file formats (designed around common desktop hardware) store integer fields little-endian — reading a field's true value means reversing its bytes first.
file format spec: little-endian 4-byte field
Cross-Checking Against a Hex Editor's Interpreted View
Many hex editors show a byte range's interpreted little-endian decimal value alongside the raw bytes — this calculator lets you verify that interpretation by hand.
confirm a hex editor's decoded value
Why Use This Calculator Instead of Doing It by Hand
- Combines the byte reversal and decimal conversion in one step
- Handles values of any byte length, not just a fixed 16/32/64-bit width
- Runs entirely in your browser — nothing you type gets sent anywhere
- Avoids the easy mistake of converting without reversing byte order first
Limitations
- Assumes the entire input is one little-endian value — it doesn't split a longer byte sequence into multiple separate fields.
- An odd number of hex digits gets a leading zero nibble added first, which can shift byte boundaries if that wasn't intended.
Frequently Asked Questions
Why isn't this the same as a plain hex-to-decimal conversion?
A plain hex-to-decimal conversion reads the hex digits as-is, most significant first (big-endian). If the bytes are actually stored little-endian, you need to reverse their order first to get the number they really represent — that's the extra step this tool does.
How do I know if my hex bytes are little-endian?
It depends on the source — most desktop and mobile CPUs (x86, ARM) store multi-byte values little-endian in memory, so raw memory dumps and many binary file formats designed for those platforms use little-endian byte order.
What's the difference between this and the Hex Little Endian Converter?
The Hex Little Endian Converter just reverses byte order and shows the resulting hex. This tool takes that extra step further and converts straight to a decimal number, skipping the intermediate hex result if that's all you need.
Does this handle values of any length?
Yes — it works on any number of complete bytes, not just a fixed 16/32/64-bit width, padding an odd digit count with a leading zero first.