Why this tool is useful
Use this converter when comparing packet captures, memory dumps and file headers whose byte sequence is correct but whose multi-byte integers are displayed in the opposite byte order.
Developer & Data · runs locally
Hex Endianness Converter
Reverse byte order independently inside 16-, 32- or 64-bit hexadecimal words while preserving word order and showing normalized bytes.
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How it works
The input is normalized to complete bytes, divided into exact-width words, and the byte sequence inside each word is reversed without changing the order of separate words.
Practical example
Two 32-bit words 12 34 56 78 and A1 B2 C3 D4 become 78 56 34 12 and D4 C3 B2 A1 respectively.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.