Swap byte order between Big Endian and Little Endian for firmware payloads, memory dumps, and protocol analysis.
Byte Visualization
Results
Big Endian—Little Endian—Middle Endian (PDP)—DEC (BE)—DEC (LE)—BIN (BE)—
Endianness Explained
Value: 0x12345678
Big Endian (BE):12 34 56 78← MSB first
Little Endian (LE):78 56 34 12← LSB first
Middle Endian (PDP):34 12 78 56← 16-bit word swap
What Is Endianness?
Endianness defines the order in which bytes are stored in memory. Big Endian (BE) stores the most significant byte at the lowest address, while Little Endian (LE) stores the least significant byte first. x86/x64 processors use Little Endian; many network protocols use Big Endian (network byte order). ARM processors can operate in both modes.
When Does Byte Order Matter?
Byte order is critical when reading multi-byte values from sensor registers, parsing binary protocol payloads, inspecting memory dumps, or interfacing two systems with different endianness. Common scenarios include I²C/SPI sensor data, UART binary packets, Modbus registers, and file format parsing.