Compare Binary Files Online

Find the bytes that differ between two binary files, such as executables, images, firmware, or data files. DiffNow shows both files side by side in hex and ASCII, with changed, added, and deleted bytes highlighted.

How to use it

  1. Drop a file on each side, or click Choose file on each side, and pick the two files.
  2. Click Compare. Binary files are detected automatically and shown in hex.
  3. To see text files in hex too, turn on Force binary comparison in Options before comparing.

Questions

Does DiffNow find inserted or deleted bytes?

Yes. Bytes added to or removed from one file are shown as such, so the rest of the files still line up instead of every following byte showing as changed.

Is there a size limit?

Free comparisons accept files up to 2 MB each; DiffNow Premium raises the limit to 8 MB.

Can I compare binary files on my own computer?

Yes, with ExamDiff Pro, the desktop tool that powers DiffNow, with no file size limits. It also edits binary files in hex and compares whole folders of them.