Stamp custom text watermarks or transparent brand logos onto your photos with adjustable opacity, angle rotation, and full-bleed repeating tile grids.
All formatting, parsing, decoding, and validation executes entirely within your browser using modern Web APIs and JavaScript. Your tokens, JSON payloads, regex inputs, and queries never leave your computer.
Protecting proprietary photographs, design previews, and client proofs against unauthorized sharing or image theft requires clear copyright attribution and unobtrusive watermarking.
DevRef's Online Image Watermark Tool allows you to apply text labels (copyright notices, author names, confidential drafts) or upload brand PNG logos. Position marks in the corner, center, or diagonally tiled across the entire surface to deter automated scraping. All compositing renders client-side on an HTML5 Canvas—your confidential proofs and original master files are never uploaded to any remote server.
No. The watermark layer is stamped onto the original image's pixel dimensions directly, preserving the native resolution and sharpness.
Yes. The watermark compositing engine fully supports 8-bit and 24-bit PNG alpha channels for smooth semi-transparent branding.
No. All stamping and rendering executes locally in your browser session. No files are uploaded to any server.