Scan Images for Nudity Offline

If you want to scan a folder of images or videos for nudity, most tools online will ask you to upload your files to their servers first. For the kind of content you'd actually want to check for, that's exactly the wrong thing to do — you'd be handing your most private files to a stranger's cloud.

SiftPics scans for nudity entirely offline. The AI model lives on your computer and runs there. Your images never leave your machine, nothing is uploaded, and you can run a complete scan with your internet turned off. This page explains how local nudity detection works and how to do it on a Windows PC.

Why scanning locally matters

"Offline" and "local" aren't just buzzwords here — they change who can see your files:

• Nothing is uploaded. The images stay on your drive. There's no server copy to leak, get subpoenaed, or sit in someone's logs.
• No account needed to scan. You don't hand over an email or sign in to check your own files.
• Works with the internet off. Pull your network cable, run the scan, and it behaves identically — proof nothing is being sent anywhere.
• No usage limits from a cloud bill. Because the compute happens on your PC, there's no per-image API cost driving the price up.

How offline nudity detection works

Modern nudity detection uses a machine-learning image classifier — a neural network trained on millions of labelled images to recognise explicit content from the pixels themselves, not the filename. Cloud services run that model on their own servers, which is why they need your upload.

SiftPics ships the model with the app and runs it on your hardware instead. When you scan a folder, each image and video frame is passed through the local model, and anything containing nudity gets flagged for review. Same category of technology big platforms use for content moderation — just running on your machine, for your eyes only.

How to scan images for nudity offline (Windows)

1. Download SiftPics and install it. No account is needed to start scanning.
2. Point it at any folder — a local drive, an external hard drive, a USB stick, or a mapped network path.
3. Pick what to scan (images, and optionally videos and archives) and start. The local AI processes each file on your machine.
4. Review the flagged results in one list, then keep, move, or delete them. You can disconnect from the internet the whole time.

What it can scan

Local scanning isn't limited to a single folder of JPEGs. SiftPics handles:

• Common image formats (JPEG, PNG, WebP, GIF and more)
• Videos — analysed frame by frame for nudity
• Archives (ZIP and others), so images inside compressed files don't get missed
• External drives, USB sticks, SD cards, and network folders — anything that appears in File Explorer

Common questions

Can I scan images for nudity without uploading them?

Yes — that's the whole point. Detection runs on your computer, so nothing is uploaded. You can verify this by disconnecting from the internet and running a scan; it works exactly the same.

Does it need an internet connection?

No. After install, all scanning happens on-device. No connection is required to detect nudity in your images or videos.

Is local detection accurate?

Yes. It runs a deep-learning classifier trained on millions of images — the same kind of model a cloud service uses, just on your hardware instead of theirs.

Is it free?

There's a free tier — 5 scans a day, up to 500 files each, no account or card. Unlimited scanning is a paid upgrade.