Duplicates

Find the files you have twice.

Duplicates compares files byte for byte, groups every copy together and suggests which one to keep. You choose the extra copies, and one copy of every file always stays.

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Duplicates: 620 files with copies and 3.5 GB in extra copies, with one video's two copies and the one suggested to keep.

A real match, or no match.

Exact matches only

Files of the same size are compared by their full contents with SHA-256. Names and dates don't matter; similar-looking photos aren't matched.

Every copy, every path

Each file shows how many copies there are, how much space the extras take, and where each copy lives.

A suggested copy to keep

Disklumo prefers the copy outside Downloads, without a "copy" or "(1)" name, then the oldest.

Select extra copies

One click selects every copy except the suggested one. Change any choice by hand.

Your folders, your threshold

Scan your home folder, or choose folders and drives. Look at files over 1 MB, 10 MB or 100 MB.

Project files left alone

Copies inside node_modules, .git, build output, virtual environments and package caches are skipped: removing them would break the project.

How it works

Three steps, no surprises.

1
Choose where to look
Your home folder, or any folders and drives you pick, and a minimum file size.
2
Find duplicates
Disklumo groups files of the same size, then compares their contents in full.
3
Choose and move
Select extra copies, or pick them yourself. Quick Look any copy, then move the extras to the Trash.

Safe by design

You stay in control.

One copy of every file always stays where it is.
Each file is checked again before it moves, and anything that changed since the scan is kept.
Your Library folder and the Trash are never scanned.
Hard links to the same file are counted once.
Extra copies go to the Trash, and Recover files puts them back.

FAQ

Questions.

How does Disklumo know two files are duplicates?

It compares their full contents. Files of the same size are read completely and hashed with SHA-256; only files with identical contents are grouped. A matching name alone is never enough.

Does it find similar photos?

No. Duplicates finds exact copies only, so edited, resized or re-exported photos aren't grouped.

Does Disklumo delete duplicates automatically?

No. Nothing moves until you choose copies and confirm, one copy of every file always stays, and the extras go to the Trash.

Can I scan an external drive?

Yes. Choose folders or drives, and pick the drive you want to check.

One window