Hey Product Hunt! 👋 I built wmgg after my own AI art got screenshotted and reposted with zero way to prove ownership. The core idea is simple: an invisible, cryptographically-signed signature embedded in your image or video's pixels. It survives screenshots, compression, rotation, and cropping — while video watermarks tolerate normal re-encoding. Everything runs 100% locally in your browser. **What's included today** ✅ Image + video watermarking (JPG/PNG/WebP/MP4/MKV) ✅ Free verification ✅ Photoshop, Photopea, and Canva plugins I'd love your feedback — especially on the robustness. Try screenshotting a signed image and verifying it; if it fails, that's a bug I want to know about. Happy to answer any questions in the comments! --- wmgg.cc Invisible watermarking (blind watermark) for images & videos. 100% local, 0% uploads.