Watermark PDF
Share tool
Only this public address is included. Your files, inputs and results stay out of the link.
Add your own text or image watermark to a PDF. Choose the pages, position, opacity and angle, then inspect the result before downloading.
Preparing your tool…
How to use it
- Choose a PDF and the pages to mark; an empty selection means all pages.
- Enter your own text or select your own PNG/JPEG/WebP image. Choose dark red, black or white for a text watermark.
- Set the centre as percentages from the left and top. Adjust text size or image width, angle and opacity.
- Choose foreground or background. Background watermarks can disappear behind an opaque page, and high-opacity foreground marks can obscure content.
- Create the PDF, inspect the actual exported preview on light and dark areas, then download watermarked.pdf.
Place COPY at the centre of a synthetic page with 30% opacity and a 35° angle. A background export must put the new drawing before the original page streams; a foreground export must put it above them.
Details & limits
Up to 25 MiB input/output and 100 pages; 60 seconds per operation. Encrypted or digitally signed PDFs, XFA, embedded files, active document actions and nonstandard UserUnit scales are unsupported. Checked JPEG and unfiltered/Flate images are supported within decoded-resource limits; no inline images, JPEG 2000, JBIG2 or CCITT. No PDF/A, PDF/UA or signature-validity certification. Text: up to 200 characters supported by the standard font, 6–200 pt. Still PNG, JPEG or WebP image input: 10 MiB, 20 MP and 8,192 px per side within resource limits. Rotation −180° to 180°, opacity 1–100%; the whole watermark must fit on the visible page.
Does a watermark protect the document from copying or remove hidden content?
No. It adds visible page content while retaining the original content and supported document features. It is not copy protection or secure redaction. Images are normalised for placement; do not use this tool as an image-metadata preservation workflow. Inspect readability and contrast in the exported document before sharing it.