Scanning 10,000+ files on a phone? Use Huge library mode. On supported Chromium browsers it enumerates the directory gradually in two metadata passes, then hashes only same-size, sample-matching candidates. This avoids constructing one giant file input list up front.

EXACTDUPE

How to use ExactDupe

ExactDupe is designed for backup folders, photo archives, downloads, project copies and any situation where the same file may exist in more than one place.

1. Add folders

Select one folder, then add another if you want to compare two drives or backups. Your browser exposes only the files you explicitly choose.

2. Pick a minimum size

The default ignores files below 1 MB. Raising this value makes a cleanup scan faster when your main goal is recovering storage. Set it to 0 if you want to include tiny files.

3. Hash the candidates

ExactDupe groups files by byte size first. Files with a unique size are skipped because they cannot be exact copies. Files that share a size are hashed in full with SHA-256.

4. Review groups

A duplicate group contains files with the same size and full hash. The suggested keeper is only a visual aid. Export CSV or JSON before making cleanup decisions.

No automatic deletion. Duplicate files may exist intentionally for backups, redundancy, sync folders or application workflows. Review paths before removing anything.

Android folder access: Android may prevent choosing the Download folder itself or the storage root. Pick a subfolder instead. Large photo libraries are processed with a sample pre-pass and one-at-a-time full hashing to reduce memory pressure.

How to use ExactDupe

1. Add folders

2. Pick a minimum size

3. Hash the candidates

4. Review groups

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