Add Watermark to PDF
Mark a PDF as confidential, draft or your own with a text watermark on every page. Adjust the opacity and angle, then download — all in your browser.
Última actualización: July 2026
This tool stamps a text watermark — like “CONFIDENTIAL” or “DRAFT” — across every page of a PDF, with adjustable opacity, font size and a diagonal or horizontal angle. The watermark is drawn into the file with pdf-lib entirely in your browser, so your document is never uploaded to a server.
Loading tool…
Cómo usar Add Watermark to PDF
- Choose a PDF file.
- Type your watermark text and adjust opacity, size and angle.
- Click “Add watermark & download”.
Preguntas frecuentes
Does it watermark every page?
Yes — the text is applied to all pages of the document.
Is my PDF uploaded?
No — watermarking happens locally in your browser.
herramientas pdf relacionadas
Add Page Numbers to PDF
Add page numbers to a PDF for free, in your browser — choose position, start number and “n / total” format. No uploads.
Organize PDF Pages
Reorder and delete pages in a PDF for free, in your browser — rearrange the sequence and remove unwanted pages. No uploads.
Add Watermark to Image
Add a text watermark to any image with adjustable position, size and opacity. Free, private, in-browser — no upload.
Unir PDF
Combina varios PDF en un solo archivo gratis, en tu navegador. Reordena las páginas y descarga: sin subir archivos, sin registro.