Add a watermark to a PDF
A classic use: mark copies of your ID or payslips with their purpose ('Copy for flat application only') before sending them. Everything runs in your browser.
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🔒 Your PDFs are processed only in your browser – they are never uploaded or stored. Suitable for confidential documents too.
How to use it
- Drop your PDF into the box.
- Type the watermark text and choose style and opacity.
- Click “Add watermark” – the file downloads immediately.
Last checked: October 2026. Found a mistake? Use the form below – we fix confirmed errors and update the date.
Frequently asked questions
Why put a watermark on an ID copy?
Consumer advice centres recommend marking copies with purpose and date so a copy can't easily be misused for something else.
Can the watermark be removed?
It is drawn into the page content; anyone with a PDF editor could edit it, so it is a deterrent, not protection.