Add Text Watermark to PDF
Stamp every page with text like “CONFIDENTIAL” or “INTERNAL USE ONLY” — tiled across the page or centered, with light / standard / dark opacity. Runs locally in your browser; your file is never uploaded.
Drop your file here
or choose from your device — no sign-up needed
Files are processed locally in your browser — never uploaded to any server
Full-release pricing preview: $6.9/mo or $49/yr · 30-day email notice before billing starts · nothing is charged during the beta
How it works (3 steps)
Upload the PDF
Select or drag in the PDF you want to watermark.
Enter the watermark text
Choose tiled or centered layout and light / standard / dark opacity.
Download the result
Every page gets a uniform diagonal watermark in a new PDF.
Popular searches
- add CONFIDENTIAL watermark to PDF
- tiled watermark for contracts and bids
- watermark PDF online free no branding
FAQ
Yes. The watermark text is rendered in your browser as a high-resolution transparent image before embedding, so any script works.
Try it ↑The default “standard” level is 15% opacity and stays readable; pick “light” or “dark” to adjust.
Try it ↑No — and we are honest about that. This tool only adds watermarks; we do not offer watermark removal.
Try it ↑No. Watermarking runs entirely in your browser.
Try it ↑No. Any change to a signed PDF (merging, compressing, watermarking…) invalidates the existing digital signature — that is the tamper-proof design of PDF signatures, not a limit of this site. Process first, then sign.
Try it ↑Yes — and you can verify it: the tool runs on open-source in-browser engines (pdf-lib, pdf.js, Tesseract OCR…) on your own device. Open DevTools → Network while processing and you will see no file upload requests.
Try it ↑Related tools
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Merge PDF
Combine several PDFs into one file, in exactly the order you want — drag to reorder before merging
Compress PDF to a Target Size
Type a target like 1MB / 500KB / 200KB and get a PDF under that size — made for visa applications, job portals and email attachment limits