Three methods, from free and manual to automatic. Updated July 2026.
There are plenty of reasons you'd want to check a computer for explicit images. Maybe you're selling or donating an old PC. Maybe you're returning a work laptop. Maybe you're cleaning up years of downloads you don't remember, or you just want to make sure a shared family computer is actually clean.
The problem is the same in every case: Windows has no idea what's inside your image files. A file called IMG_4821.jpg looks exactly the same to Windows whether it's a screenshot of a recipe or something you'd rather not have on there. So you have three options — check by hand, use search tricks to narrow things down, or let software look at the actual pixels for you.
Free, no software needed, and honestly worth doing first. Most images on a PC end up in a handful of predictable spots:
Set File Explorer to Extra large icons so you can eyeball thumbnails quickly, and sort by date to find old stuff you forgot about.
Where this falls apart: it only works if there's a manageable number of images and they're where you expect them to be. A typical PC has tens of thousands of images once you count app caches and old backups. Nobody is eyeballing all of that.
Windows search can't see image content, but it can narrow the haystack. In File Explorer, click the search box and try:
Run kind:=picture size:>500KB on C:\Users and you'll get every substantial image on the machine in one list you can scroll through as thumbnails.
Where this falls apart: you're still the one doing the looking. On a drive with 40,000 images, this is hours of scrolling — and images inside ZIP archives or with the wrong extension won't show up at all.
This is the approach that actually scales. Machine-learning image classifiers look at the content of each image — the pixels, not the filename — and flag the ones containing nudity or explicit material. It's the same category of technology big platforms use for content moderation, except running on your own computer.
One thing to watch for: many "nudity detector" tools on the web work by uploading your images to their servers. Think about what that means for exactly the files you're worried about. If you go this route, use something that runs offline.
That's the reason I built SiftPics. You point it at a folder or a whole drive, it runs an AI model locally on your machine, and it shows you just the images it flagged so you can review, move, or delete them. Nothing gets uploaded — you can even run it with Wi-Fi turned off. It handles images, videos, and archives, and works on external and network drives too.
The free version does 5 scans a day of up to 500 files each — no account, no card. That covers the Downloads-Pictures-Desktop sweep for most people. The paid version removes the limits for full-drive scans.
No. It can filter by type, size, and date, but it cannot look inside a picture. That's why methods 1 and 2 always end with you manually reviewing thumbnails.
Most do — that's how they work. The analysis happens on their servers, which means your private files leave your machine. Offline tools run the model locally instead.
Yes. Anything that shows up as a drive or folder in File Explorer — USB drives, external hard drives, SD cards, mapped network shares — can be scanned like any other folder.
Methods 1 and 2 are completely free. SiftPics' free tier (5 scans/day, 500 files per scan) is enough for spot-checks; unlimited scanning is paid.
SiftPics finds explicit images with on-device AI. Free to try — no account needed.
Download for Windows