Duplicate File Finder

Find extra copies by their exact content. Compare files or a folder right on your device, then review a report before you decide what to do.

⌁ Exact content matches▧ Choose files or a folder↓ CSV report◈ Nothing uploaded

YOUR FILE CHECK

Find the extra copies.

Matching sizes are only a clue. ECECH checks the SHA-256 content before calling files duplicates.

✓ This device only

Choose files to compare2–200 files · up to 256 MB each, 2 GB total · no uploadBrowse files

▧ Choose a folderIncludes nested folders where your browser supports folder selection.

Only file bytes and names in this tab are checked. Nothing is uploaded; originals are never changed or removed. CSV reports download only when you choose. Visually similar images are not duplicates.

HOW IT WORKS

Same size is a hint.
The bytes decide.

The tool skips files with unique sizes, then compares the content of same-size candidates. Your originals remain untouched.

1
Choose local files
Select files directly or choose a folder. Up to 200 files can be checked together.
2
Check exact content
SHA-256 fingerprints identify byte-for-byte matches, even when names differ.
3
Review and save a report
Download a CSV of duplicate groups. Decide yourself whether to keep or remove a copy.

Duplicate File Finder

Find the extra copies.

Same size is a hint.The bytes decide.

More from ECECH

Same size is a hint.
The bytes decide.