Add Watermark to PDF
Stamp a diagonal text watermark across every page of a PDF — set the text and opacity, then download. Runs entirely in your browser, no upload.
Your file never leaves your device — there's no upload step at all. You can verify it: open your browser's DevTools → Network tab and watch as you use the tool. Zero file uploads.
How this works
Use the tool locally, download the result, and contact VNG only when this needs to become a repeatable workflow.
How it works
- 1
Choose your PDF
Drop in the document to watermark.
- 2
Set the text
Type the watermark text and pick how faint it should be.
- 3
Download
The watermarked PDF is built locally and downloaded.
Frequently asked questions
Is anything uploaded?
No — the watermark is drawn on your device with pdf-lib. The file never leaves your browser.
Can I use an image watermark?
This tool does diagonal text. For image stamps positioned anywhere, use PDF Studio.
From the guides
Recipes, PC building, evidence-based study systems, and more — the VNG guide library.
Need this at scale — or something custom?
This tool runs entirely in your browser — that's the same privacy-first engineering we build for companies: dashboards, AI automation, data pipelines, and client platforms. One person, senior work, fast turnaround.
— Amit, VritantaNextGen · replies within 24 hours