PDF watermarking
Bulk Add Watermarks To PDFs
Ideal for protecting archives. Bulk select PDF documents and securely stamp every page identically before distribution.
Why teams pick us
Built specifically for pdf
Standardize Legal Marks
Stamp 'CONFIDENTIAL' natively onto hundreds of documents instantly without breaking a sweat.
ZIP Downloads
Downloads are packaged neatly. Start a bulk task and go grab a coffee—come back to a compiled ZIP securely watermarked.
Scalable Through API
Link your internal documentation flows to our API to batch process and watermark PDFs dynamically.
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/batch \
-H "Authorization: Bearer aw_••••••••" \
-F "images[]=@doc1.pdf" \
-F "images[]=@doc2.pdf" \
-F "images[]=@doc3.pdf" \
-F "text=CONFIDENTIAL" \
-F "position=tiled" \
-F "opacity=0.15" \
-o stamped.zip
# Up to 20 PDFs per request · multi-page · vector-preservingFAQ
PDF watermarking — the short answers
Does it watermark all pages of all PDFs?
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Yes, every internal page of every selected document receives the identical watermark overlay.
Are they safe?
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Your source documents are permanently deleted from our servers right after processing finishes.
Ready to watermark your pdf?
Free tier covers 100 calls a month. No credit card needed.