Give each book its own place.
This tool groups byte-identical files using SHA-256 and separately flags EPUBs with matching normalized title and author. It never deletes books. Similar metadata is a prompt for review, not proof of duplication.
Two kinds of matches
An exact match means the entire file is identical. A probable match means descriptive metadata agrees. Revisions, translations, or different formats can share titles, so those candidates need a human decision.
Keep backup copies out of the cleanup
A deliberate backup is supposed to duplicate the original. Scan the working collection first, or make sure you recognize which files came from recovery storage. The report cannot know your intended backup strategy.
Review reading history first
Before removing a copy elsewhere, check whether a reading app associates notes with it. Export annotations and preserve the authoritative copy. This tool provides evidence; deletion stays in your own file workflow.
The details, at a glance.
| Consider | What to look for |
|---|---|
| Exact group | Matching full-file SHA-256 |
| Probable group | Matching EPUB title and author |
| Different hash | May still be the same work with changed packaging |
| Action | Download a review report; no file deletion |
A few things worth asking.
Can it compare PDFs?
It can detect byte-identical PDFs and other files. Probable title matching is available only for readable EPUB metadata.
Does it find every duplicate work?
No. Different editions, missing metadata, and changed titles can prevent a match.
Written by Binge Reader. Our comparisons explain documented workflows and practical tradeoffs; they are not independent product benchmarks.