Stamp / Logo

Overlay PNG/JPG on every page with position and scale controls。 Runs locally—nothing uploaded.

PDF parsing and export is done locally in your browser; files are not uploaded to any server.

Select or drop PDF

Select or drop image

Related tools

Text Watermark PDF Merge Encrypt PDF (Password Protect)PDF Signature Check PDF Compress (Best for Scans)

Related tutorials

PDF Watermarking Guide

How to use & FAQ

Why Tools Ku

Free, no signup
Browser-local, not uploaded
No install
Desktop & mobile

Stamp / Logo: Overlay PNG/JPG on every page with position and scale controls. Runs locally in your browser—PDFs are never uploaded to our servers.

No signup. Combine with merge, split, and compress tools for a full workflow.

Steps

Upload or drop your PDF
Configure options on the page
Run processing locally
Download the result

FAQ

Signup required for Stamp / Logo?: No. Free with no account.
Is my PDF uploaded?: No. Processing stays on your device.
Password-protected PDFs?: Use Decrypt PDF first if you know the password.
Quality loss?: Most ops preserve content; rasterizing tools note trade-offs on-page.
Mobile browsers?: Yes; heavy tasks better on desktop Wi-Fi.
Copy or download?: Yes—copy text or download files as supported.