Is DupClean really safe to use?

Yes. This tool runs 100% inside your local web browser. No images are ever uploaded to any cloud server. Your privacy is totally guaranteed.

How does it detect duplicate photos?

We use advanced algorithms including exact SHA-256 hash matching and perceptual hashing (pHash) which analyzes visual similarity even if photos are resized or compressed.

Can I delete the files from my hard drive directly?

For your security, web browsers have strict limits on deleting local files. If direct deletion is not supported, we generate a secure script (.bat for Windows, .sh for Mac/Linux) to safely remove duplicates in one click.

Yes, DupClean is a completely free, pure frontend web tool with no hidden fees or limits.

DupClean - Free Online Photo Cleaner

Are you looking for a secure, fast, and 100% local duplicate photo finder? You have found the right tool.

Why Choose Duplicate Image Finder?

Unlike other tools that force you to download software or upload images to a server, this app leverages modern Web APIs to process everything right inside your browser. This means absolutely zero privacy risk.

Find identical files using SHA-256.
Find visually similar images using pHash algorithms.
Uses multi-core Web Workers to scan thousands of images instantly.
Export a safe batch or shell script to bulk delete files from your system.

The Safest Way to Clean Your Hard Drive

Since this tool works offline and operates in a secure web sandbox, it only has read-access to the directory you explicitly select. It will never silently delete your files. Instead, it provides you with a carefully constructed script that you can review before executing on your Windows, macOS, or Linux machine.