File Comparer

Compare two files by size and SHA-256 — are they bit-identical?

Tool Media & Files Updated Apr 19, 2026
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How to Use
  1. Drop or pick two files.
  2. Equal size + equal SHA-256 = identical.
Files
A
Drop first file
—
B
Drop second file
—
Verdict
Waiting

Notes

Size first
Different = not equal
Hash second
SHA-256 confirms
Hash equal
Bit-identical
Collisions astronomical.
Hash differs
Files differ
Somewhere — byte-diff needed for where.
Speed
~500 MB/s
WebCrypto.
Privacy
Local

Frequently Asked Questions

Partial match?

If SHA-256 differs, the files differ — no byte-level diff here; use Text Diff for text.

How big?

Anything your browser can read — processed in chunks.

Common Use Cases

Backup check

Did the copy succeed byte-for-byte?

Dedup

Confirm two files are truly identical before deleting one.

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