File Comparator

Compare two files side by side

File 1

File 2

About File Comparator

File Comparator is a free online tool that instantly checks whether two files are byte-for-byte identical, entirely in your browser. It's a fast way to verify that a downloaded file matches the original, confirm a backup is intact, or spot accidental duplicates — no upload, no software installation.

How to use File Comparator

1Click the first box and select the first file to compare.
2Click the second box and select the second file.
3Click "Compare Files" to check them byte-by-byte.
4View the result — "Files are identical" or "Files are different" — along with each file's name and size.

Frequently Asked Questions

What does File Comparator actually compare?

It performs an exact byte-for-byte binary comparison — it tells you whether two files match, not a line-by-line text diff.

What file types are supported?

Any file type. Since the comparison works on raw bytes, there are no format restrictions.

Is File Comparator free to use?

Yes, it's completely free with no signup and no limit on how many comparisons you can run.

Is my data private?

Yes. Both files are compared entirely in your browser — neither one is uploaded to a server.

Tips & Tricks

✓Use this to confirm a downloaded file matches the original before deleting your source copy.
✓If the two files show different sizes, they're guaranteed to be different — no need to dig further.
✓For text or code files where you need to see exactly which lines changed, use a dedicated text-diff tool instead — this tool only reports whether files match.
✓Handy for spotting accidental duplicate files saved under different names before cleaning up storage.