PDF Merger
Combine multiple PDF documents in your chosen order.
PDFPDF tools
PDF Watermark Tool
Add a subtle text watermark to every page of a PDF.
Your workspaceProcessed in your browser
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How to use pdf watermark tool
- Choose a PDF and enter Watermark text using supported Latin characters.
- Adjust Opacity and Font size, then select Create PDF.
- Download and inspect the watermark on all pages.
Work through an example
Choose a short Latin-character label, adjust opacity and font size, and review the horizontal watermark on every page.
Add a readable text watermark across a PDF →Formats, privacy, and practical limits
Up to 30 MB per PDF and 100 pages per operation. Password-protected PDFs are not supported. Processing stays in this browser. PDF rewriting may invalidate digital signatures.
Files and generated results exist only for this tab session. Download any result you want to keep before leaving the page. Browsers may use temporary memory or disk cache while processing.
Frequently asked questions
Is a watermark an access restriction?
No. It is visible page content, not encryption, permissions enforcement, or a digital signature.
Can I watermark only a selected range?
This workspace applies the watermark to all pages. It does not expose a page-range control for watermarking.