⚡ Pure Frontend · No Uploads · Live Preview · Auto-Saves Settings
Tacmark is a fully offline image watermarking tool. All image processing—including rendering and downloading—happens entirely within your browser. Your photos never leave your device, with no backend servers storing or forwarding them. It features adaptive blending: watermark colors automatically adjust to match your image, making them visible yet unobtrusive. Ideal for CONFIDENTIAL leak prevention, design copyright marking, and ID protection. Open-source, free, and no registration required.
Your images never leave your browser. We have no backend servers, no databases, and use no tracking cookies. The page only fetches HTML/CSS/JS resources once on load, after which it works entirely offline. The only external request is for anonymous traffic analytics via Cloudflare Web Analytics, which uses no cookies and collects no personal data.