Stamp a custom text watermark across every page — control opacity, rotation, size and colour.
Add a repeating diagonal text watermark to every page of your PDF. Fully adjustable text, opacity, rotation, font size and colour — mark documents as CONFIDENTIAL, DRAFT, or with your own name to deter unauthorised sharing. Files are processed securely and never stored.
Upload your file using the tool above.
Adjust any settings to your preference.
Click the process button and wait for results.
Download your output using the download button.
Anyone determined enough can — the watermark is drawn into the page, not locked to it, so it can be edited out with the right software. Treat it as a clear deterrent and a statement of intent, not as security. If a document genuinely must not be redistributed, combine it with password protection.
Around 20–35% opacity at a 45-degree diagonal is the standard for a reason: clearly visible, but the underlying text stays readable. Go heavier only when you actively want to discourage reading. Very low opacity looks accidental and disappears entirely when the page is printed in black and white.
Yes, the same text is applied across all pages in the same position, which is what you want for CONFIDENTIAL or DRAFT markings — a watermark on page one only is trivially defeated by sharing page two. The original text stays selectable underneath, so the document remains searchable.
Yes, Add Watermark to PDF is completely free. No signup, no account, and no watermark on outputs. A Pro tier is available for 100 AI ops/day and larger file sizes.
Add Watermark to PDF uploads your file over an encrypted connection to our own processing server, converts it, and returns the result. The file is deleted immediately after processing and is never used for anything else. It is not sent to any third party, and we keep no copies.
Drop a PDF to watermark
Add a repeating text or image watermark across every page
Drop your file into the stage to begin.
Why watermark: A watermark marks a document as confidential, draft, or your property — deterring unauthorised sharing and making the file’s status obvious at a glance.
Fully adjustable: Control the text or logo, opacity, rotation, size and colour. The watermark repeats diagonally across every page so it can’t be cropped out of a single corner.
Privacy: Your PDF is sent over an encrypted connection, watermarked in memory, and deleted immediately after — never stored.