PDF watermarking
Watermark PDFs Securely
Stamp every page of your PDF documents with your brand logo, name, or the viewer's distinct information.
Why teams pick us
Built specifically for pdf
Multi-Page Support
Automatically applies the watermark to every single page in your PDF document effortlessly.
Text & Image Compatible
Use your brand logo or generate a text overlay natively inside the PDF structure.
Document Integrity
We preserve your original vector texts and formatting. Only a distinct visual overlay is appended.
Developer flow
One endpoint per file
POST a pdf and a config. Get the watermarked result back. Same request shape across formats — only the file type changes.
Full API referencecURL
curl -X POST https://api.apiwatermark.com/watermark \
-H "Authorization: Bearer aw_••••••••" \
-F "image=@contract.pdf" \
-F "text=CONFIDENTIAL · {{email}}" \
-F "position=tiled" \
-F "opacity=0.15" \
-o watermarked.pdf
# Variables like {{email}}, {{ip_address}}, {{timestamp}}
# resolve per request — burn the viewer's identity into every page.FAQ
PDF watermarking — the short answers
Is the watermark applied to every page?
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Yes, our engine loops through your document and embeds the watermark on every page seamlessly.
Are the original texts still selectable?
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Yes, the underlying PDF structure remains fully intact. You can still select and highlight text beneath the watermark.
Ready to watermark your pdf?
Free tier covers 100 calls a month. No credit card needed.