Best duplicate file checker for quickly finding duplicates on Windows or Mac?

There are so many free and paid duplicate file checker for Windows and Mac. So it is hard to choose the best one by your own.

 First, consider the ​​scanning method​​—basic tools compare file names and sizes, which is fast but less accurate. For reliable results, opt for tools that use ​​checksum hashing​​ or ​​byte-by-byte comparison​​, as these ensure true duplicates are detected, even if filenames differ. If you deal with media files (photos, videos), look for a tool that includes ​​visual comparison​​ to catch similar but not identical files.

Next, evaluate ​​ease of use and features​​. A good duplicate file checker should have a clear interface, customizable filters, and flexible deletion options. Some tools offer ​​preview functionality​​, letting you review files before deletion, which is crucial for avoiding accidental data loss. If you need automation, check whether the duplicate file finder software support ​​scheduled scans​​ or command-line usage for advanced users.

Finally, consider ​​compatibility and security​​. Ensure the duplicate file checker tool works on your OS (Windows, macOS, or Linux) and supports external drives or cloud storage if needed.