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Skip to contentAdd draft, confidential or logo watermarks to PDFs and images locally.
Review copies and leak deterrence need visible stamps — Tentaco watermark hub applies text and image overlays without cloud queue.
Adjust opacity and page range before sharing externally. Browse related Tentaco tools on this hub, open a studio mode when you need a fuller workspace, and keep files on your device whenever the tool runs locally.
PDF Watermark — draft confidential stamp
Add a diagonal text watermark to all pages. Use Tentaco PDF Watermark to process the file in your browser and download the result — no account.
PDF Redact — black out sensitive text
Black out sensitive regions in a PDF. Use Tentaco PDF Redact to process the file in your browser and download the result — no account.
PDF Sign online — free in your browser
Add a text or image signature to PDF pages. Use Tentaco PDF Sign to process the file in your browser and download the result — no account.
Image Resizer — scale images online
Resize images in your browser and download the result. Use Tentaco Image Resizer to process the file in your browser and download the result — no account.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
Use original file — watermarks are burned into export.
Deterrent only — not DRM.
PDF watermark mode covers documents; image tools for PNG/JPEG.