A dedicated tool like Nektony Duplicate File Finder generally finds more duplicates (including visually similar, not just byte-identical, files) than a built-in tool, but always review its suggestions manually before deleting anything, regardless of which tool you use.
Who a dedicated finder suits
- A dedicated duplicate finder suits you if: you have photos duplicated across multiple folders or devices with slightly different file names, which built-in tools often miss.
- A built-in duplicate tool suits you if: you are only checking within one single, well-organised app or library (like Google Photos’ own duplicate detection) and want the simplest option.
What Nektony checks that built-in tools don’t
- Dedicated tools like Nektony typically compare file content, not just file names, so they can catch duplicates even when files have been renamed differently.
- Built-in tools (like Google Photos’ own duplicate finder) are usually limited to duplicates within that one app’s library, and will not catch copies sitting in separate folders on your computer.
- Dedicated duplicate finders often let you preview and manually confirm each match before deleting anything, which is an important safety feature worth checking any tool actually offers.
- No duplicate-finding tool is perfect — a photo that has been cropped, edited, or resized slightly differently may not be detected as a duplicate by either type of tool, even though it is the same underlying photo.
Questions to ask before deleting anything
- Are your possible duplicates spread across multiple folders or devices, or all within one single app or library?
- Does the tool you are considering let you review and confirm matches individually before deleting, rather than deleting automatically?
- Have you backed up your photo library before running any duplicate-removal tool, just in case something is wrongly flagged?
A safer way to test it
Whichever tool you use, always back up first and review flagged duplicates individually before confirming any deletion — this single habit matters more than which specific tool you choose.
Next step
Merge two people’s overlapping photo collections without duplicating everything is a related task once you have settled on a duplicate-finding approach.
Sources and date checked
Nektony’s own Duplicate File Finder documentation and general guidance on duplicate-detection tools. Checked 22 September 2026.