Watermark PDF Online
Add a text or image watermark to every page.
Drop files here, or click to browse
The watermark is drawn diagonally across every page.
Max 50 MB per file
Watermark PDF adds a text or image watermark to every page of your document. ConvertDa's free Watermark PDF tool stamps your file with custom text — like CONFIDENTIAL or DRAFT — at any opacity, angle, and position. Output downloads instantly.
How to watermark pdf
- 1
Upload your PDF.
- 2
Type the watermark text and pick an angle + opacity.
- 3
Download the watermarked PDF.
Frequently asked questions
Can I use an image watermark?▾
Yes. Upload a PNG and it will be tiled across each page.
Can I remove the ConvertDa watermark?▾
We don't add one. Only the watermark you specify appears in the output — no branding from us.
Will the watermark be removable later?▾
Watermarks are merged into the page content layer, so they cannot be 'turned off' by a viewer. They can be removed by editing the PDF in advanced software, so this is not a security feature — use Protect PDF for that.