Free, no signup
Add a watermark to a PDF
Mark a PDF as a draft, confidential, or yours, with text or a logo.
Do this from your code
The same job as one API call. It works with a free key: 100 renders a month, no card.
curl https://pdfoven.com/v1/pdf/watermark \
-H "Authorization: Bearer $PDFOVEN_KEY" \
-F file=@contract.pdf -F text=CONFIDENTIAL \
-F position=center -F opacity=0.2 -F color=#c8155f \
-o watermarked.pdfAutomate this with the PDFOven API
Everything this tool does is one HTTP request away. Use it for watermarking PDFs from your app, a background job, or an AI agent. The free plan includes 100 renders a month.
curl https://pdfoven.com/v1/pdf/watermark \
-H "Authorization: Bearer $PDFOVEN_KEY" \
-F file=@contract.pdf -F text=CONFIDENTIAL \
-F position=center -F opacity=0.2 -F color=#c8155f \
-o watermarked.pdf