Your images never leave your device. Not even for a millisecond.
Unlike every other watermark tool, Watermarkerly never touches your files. Everything runs in your browser using the HTML5 Canvas API. Open DevTools and watch — nothing goes out.
How it works
Everything runs in your browser — your images are never transmitted to any server, ever.
Your image loads directly into the browser canvas using the HTML5 File API. It never touches a network — verified in DevTools.
Text and logo compositing happens via the HTML5 Canvas API — 100% on your CPU. No cloud rendering, no server calls.
Your watermarked image is saved directly to your device via the browser. No server ever saw the file — not even for a moment.
Privacy
Most tools upload your photos to a server. We don't — because there's no server to upload to. Everything runs locally, right in your browser.
Your photos are processed using the HTML5 Canvas API — entirely in your browser's memory. They never touch a server, never transit a network, never leave your machine.
We use zero cookies. No analytics scripts watching what you do. No fingerprinting. No ad networks. We genuinely don't know who you are — and that's the point.
We store nothing about you or your images — not on our servers, not in any database. Your watermark text preference may be saved in your own browser's LocalStorage, which only you can access.
Once the page loads, you can disconnect from the internet entirely. Watermarkerly keeps working. It's just your browser and your files — no dependency on any external service.
Preview
A watermark that's visible enough to protect, subtle enough to impress. Customise opacity, rotation, and position to match your style.
Watermark styles
Diagonal Tiled
Repeating grid, 20° rotation
Centered Subtle
Low opacity, center position
Corner Stamp
Bottom-right, compact
Features
Built for photographers, creators, and anyone who wants to protect their work without jumping through hoops.
No upload wait times, no server queues. Your image is processed locally the instant you make a change — preview updates are real-time.
Privacy isn't a marketing claim — it's the architecture. With no server to send data to, your images literally cannot be accessed by anyone but you.
Open the tool and start immediately. No email, no password, no subscription tier to choose. We don't even want your data — that's the whole point.
Once the page loads, disconnect from the internet. Watermarkerly keeps working, because it doesn't need a connection to do its job. Full offline capability.
FAQ
No signup. No upload. No nonsense.
Open the tool and start in under five seconds.