Block Revenge Porn Photos & Videos on Facebook via StopNCII.org

StopNCII.org is the official tool to block intimate images on Facebook (and Instagram/Threads). You select the images on your device. The tool creates a "Digital Fingerprint" (Hash) locally. This hash is sent to Facebook to block future uploads. Your images never leave your phone.

Victims often fear using this tool because they think they have to "upload" their nudes to a database to get them protected. This is incorrect. StopNCII uses on-device hashing. The only thing that leaves your phone is a string of numbers (e.g., `a1b2c3d4...`), which Facebook adds to its "Banned List."

Checklist

• Age Requirement: You must be 18+ (Use "Take It Down" by NCMEC if under 18).
• File Possession: You must have the exact original photo/video file on your device.
• Platform Scope: This covers Facebook, Instagram, Threads, and TikTok.
• The Hidden Requirement: The "Source File" Match. You must hash the exact file the attacker has. If they have a video, and you hash a screenshot of that video, the block will fail. You need the original video file.

Step-by-Step Guide

• Step 1: Access the Tool
  Go to StopNCII.org on the mobile device or computer that holds the images. Click "Create Your Case."
• Step 2: Select Images
  Select the specific photos/videos you are afraid will be leaked. The browser will process them locally.
• Step 3: Save the Case Number
  CRITICAL: The site will give you a Case Number and a PIN. Write this down or screenshot it. Since the system is anonymous (no email login), if you lose this number, you lose all control over the case.
• Step 4: The Silent Block
  Once the hash is generated, it is pushed to Facebook's moderation system. If anyone (including you) tries to upload that file, it will fail immediately.

How It Works & Hidden Details

The technology is called "Perceptual Hashing."
When you select an image, the algorithm converts the visual data into a unique alphanumeric code (the Hash).
Facebook receives this code. When a user attempts to upload any image to Facebook, Facebook's server calculates the hash of the incoming image.
Logic: If `Incoming Hash` == `StopNCII Hash`, the upload is rejected instantly.
This means the moderator at Facebook never sees your nude photo; they only see a code match.

Things to Watch Out For

• Risk 1: The "Crop/Filter" Bypass. If the attacker significantly crops the image, changes the color filter, or overlays text, the hash changes. The block might fail against "edited" versions.
• Risk 2: Existing Posts. StopNCII is primarily a preventative shield. While it creates a report for existing content, it is faster to report an already uploaded post directly via Facebook's "Report -> Nudity" menu first, then use StopNCII to prevent re-upload.

Frequently Asked Questions

• Q: Will this block the image on Twitter/X or Telegram?
  A: No. StopNCII partners with Meta (FB/Insta), TikTok, and Bumble. It does not cover Telegram or X (Twitter). You must report manually there.
• Q: Can I unlock the image later?
  A: Yes. Use your Case Number and PIN to "Withdraw" the case on StopNCII.org. The ban will be lifted across platforms.

Update: Additional Details & Recent Changes

• New Partners (2025-26):
  The partner network has expanded significantly. Apart from Meta and TikTok, StopNCII now actively blocks content on BlueSky, Reddit, Snap Inc. (Snapchat), OnlyFans, Pornhub, and RedGIFS. If you hash your images here, they are preemptively blocked on all these platforms simultaneously.
• Coverage for "Deepfakes" & AI Nudes:
  As of late 2025, StopNCII explicitly accepts Synthetic/AI-Generated intimate images. If someone created a deepfake of you, you can hash that file (if you have it) to prevent its spread, just like a real photo. You do not need to be the "original photographer" of a fake image to protect yourself against it.
• The "Take It Down Act" (US Law - May 2026):
  A new US federal law, the Take It Down Act, comes into full effect in May 2026. It legally mandates that covered platforms must remove non-consensual intimate imagery within 48 hours of receiving a valid notice. StopNCII is recognized as a valid technological tool for this notification, giving your "Case Number" legal weight in the US jurisdiction.
• Global Clearing Centre (Automation):
  SWGfL has launched a "Global Clearing Centre" pilot. This integrates reporting across various NGOs. If you report a case to a local partner NGO (like Revenge Porn Helpline in UK or Cyber Civil Rights Initiative in US), they can now push hashes directly into the StopNCII bank without you needing to redo the process manually.