See Which Bytes Changed Between Two Files
TL;DR: Hex Compare is a free online tool that shows the byte-level differences between any two files — hex and ASCII side by side, insertions kept aligned, a change list to step through — right in your browser, no signup, nothing uploaded or transferred.For firmware, exports, save files — anywhere “binary files differ” isn't an answer.
Start Comparing Files…
개발자: Christopher Atlan (Leitmotif GmbH). 2020년부터 파일 비교 도구를, 18년 넘게 소프트웨어를 만들고 있습니다. diff.tools의 아이디어는 하나입니다. 형식마다 특화된 도구가 있고, 그 결과를 다음 도구로 넘길 수 있습니다.
A quick tour
An insert is an insert
Most byte-by-byte tools fall apart the moment a file grows by a few bytes: everything after the insertion “differs.” Here the files are aligned by content — below, 12 inserted bytes show as one small insert, the offsets diverge, and every row after still lines up.
A change list, not a scavenger hunt
Every changed region is a card — offset range, the bytes before and after — and clicking one jumps straight there. Or type an offset. The unified view shows both files' offsets in one aligned grid, and the row width switches between 8, 16, and 32 bytes.
Big files stay smooth
The comparison runs in a background worker with live progress, and only the rows on screen are rendered — so multi-megabyte files scroll like small ones. Files that turn out to be completely unrelated degrade gracefully to a coarse alignment with an honest badge instead of a hung tab.
