Endianness Converter

Big-Endian and Little-Endian Byte Order

Endianness describes how multi-byte integers are stored in memory. Big-endian places the most significant byte first; little-endian places the least significant byte first. Network protocols and file formats often specify one order, while x86 and many ARM systems use the other at runtime.

This tool converts unsigned 16-, 32-, and 64-bit values between decimal, hex integers, and raw byte sequences. It shows both the original byte order and the swapped order so you can verify struct layouts, packet headers, and firmware dumps. For text encodings with endian markers, see UTF-16 to UTF-8 Converter.

How to Use It

• Enter a decimal or hex integer and pick bit width to see bytes in the chosen order.
• Paste space-separated hex bytes to recover the unsigned integer value.
• Compare the swapped row when moving data between big-endian wire formats and little-endian hosts.