StampThat: Prevent Scammers from Stealing your Identity
Extension Actions
- Extension status: In-App Purchases
- Live on Store
Protect yourself from Identity Theft by using Stamp That!
StampThat automatically watermarks your documents the moment you upload them—anywhere on the web: email, Google Drive, WhatsApp Web, administration portals, bank forms, and more.
A watermarked ID or contract cannot be reused to take out loans or commit fraud. With StampThat, your documents stay usable for their purpose, but worthless to hackers.
How it works
- 📤 Detects document uploads automatically (drag & drop, paste, file inputs)
- ✍️ Adds customizable watermark instantly
- 🌐 Works on any website
- ✅ Supports images, PDFs, and ZIP archives
- 🔍 Format whitelists & blacklists for full control
All processing happens locally in your browser. Your files never leave your computer.
Built for people who share sensitive documents
- Anyone looking for a rent, submitting documents to banks, landlords, or administrations
- Freelancers sending IDs or contracts
- Students applying to job offers
Privacy by design
- ✅ 100% local processing
- 🚫 No data collection
Stamp That is available in 18 languages.
- 🆓 FREE weekly quota included
- 💳 Buy credits for unlimited usage
👉 Install the Stamp That Chrome extension in one click and protect your personal data BEFORE sharing, NOT WHEN IT'S TOO LATE.
Latest reviews
- Alexandte RFST
- Very easy to use, it's automatic when you upload a document. I mainly use it in gmail
- Alex Kaffier
- This is really useful. I know someone who suffered an identity theft, it's harsh