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Duplicate file finder
Find byte-identical local files using SHA-256, regardless of their names.
Files stay in your browser. Nothing is uploaded. Up to 50 files, 64 MiB each.
Enter your values or select local files.
Formula
Group key = SHA-256(file bytes) + byte length; group size > 1.
Worked example
notes.txt: "abc"; copy.txt: "abc" → 1 group, 2 files; other.txt: "abcd" → separate.
How to use this tool
1
Enter your values or select local files.
2
Review the result and the assumptions.
3
Reset the tool to compare another scenario.
Good questions. Clear answers.
How to use this tool
Enter your values or select local files. Review the result and the assumptions. Reset the tool to compare another scenario.
Formula
Group key = SHA-256(file bytes) + byte length; group size > 1.
Choose files
Files stay in your browser. Nothing is uploaded. Up to 50 files, 64 MiB each.
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