Hashing an image — without ever uploading it — lets major platforms block it; StopNCII has stopped over a million from spreading.
- Knowing the tool exists before a crisis means panic doesn't make the first decision.
- The image never leaves the device — only a fingerprint is shared, which protects privacy.
- Match the tool to the age: Take It Down for under-18s, StopNCII for adults.
- Removal and reporting work together; one stops the spread, the other addresses the coercion.
The situation, the move, the outcome.
StopNCII, run by the UK's Revenge Porn Helpline, helps people stop the spread of intimate images shared without consent. A user (18+) selects the image on their own device; the tool creates a digital fingerprint, or hash, and shares only that hash with partner platforms, which then detect and block matching images. The picture itself never leaves the device. Over a million hashes have been created, 300,000+ images removed, and the tool reports a removal rate above 90%.
What makes the approach work in practice is that it separates detection from exposure: the system needs only a mathematical fingerprint of an image to recognize and block copies, so the picture itself never has to be uploaded or shown to anyone. That design removes the cruel trade-off victims used to face — handing over the very image they're trying to contain. Once partner platforms hold the hash, they can catch matching uploads across their services without a person having to hunt each one down. For families, the key move is simply knowing which tool fits the age and acting early, before the panic of the moment drives a worse choice.
Why it matters beyond one family.
For anyone under 18, NCMEC's Take It Down is the equivalent. Both prove the same point: image-based abuse is not hopeless — there are free, privacy-preserving tools that work at the platform level.
This generalizes because the same hashing principle now underpins a small ecosystem of free services covering both adults and minors, which means almost anyone facing image-based abuse has a route that protects their privacy. The broader point is that this category of harm is not hopeless: there is real infrastructure, built specifically for it, with high reported success. That reframes the parent's job from somehow scrubbing the internet by hand to knowing where to point a frightened teen. Pairing removal with reporting the coercion addresses both halves of the problem — the spread of the image and the person behind the threat.
- These are free, privacy-preserving tools that work at the platform level, where individuals can't reach.
- Because only a hash is shared, a teen never has to hand their image to anyone.
- Reported removal rates are high, so the effort genuinely pays off.
- Image-based abuse is treated as solvable, which replaces helplessness with a clear next step.
How to apply it.
- Know the tool exists before you need it, so panic doesn't take over.
- For under-18s use Take It Down; for adults, StopNCII.
- Save the evidence and report coercion to law enforcement.
I think someone has a picture of me they're threatening to send around. I feel sick.
Thank you for telling me. You're not in trouble, and we are going to handle this together, step by step.
I just want it gone. I don't want anyone to see it.
There are free tools built for exactly this. The image stays on your device — they only share a kind of fingerprint that platforms use to block it.
Wait, I don't have to upload the actual photo to anyone?
No. The picture never leaves your phone. Since you're under 18, we'll use the one made for that.
And the person threatening me?
We save the messages as evidence and report the threats — that part isn't yours to carry alone.
Okay. I was scared to tell you.
I'm really glad you did. The fastest way out of this is doing it together, starting now.
Concrete next steps.
- Start at StopNCII.org (18+) — the image stays on the device, only the hash is shared.
- Use takeitdown.ncmec.org for anyone under 18.
- Combine with reporting to the platform and, where relevant, the FBI.
Read it for yourself.
- StopNCII.org — official tool stopncii.org ↗
- SWGfL — StopNCII overview and results swgfl.org.uk ↗
- StopNCII — how it works stopncii.org ↗
If your teen is being sextorted: do not pay, do not delete anything, and stop all contact with the offender. Save the messages and usernames. Report to the FBI at tips.fbi.gov or 1-800-CALL-FBI and to NCMEC's CyberTipline at CyberTipline.org. Use NCMEC's free Take It Down tool (takeitdown.ncmec.org) to stop images from spreading. For emotional crisis, call or text 988 (Suicide & Crisis Lifeline, 24/7).
