Stamp image, text, or PDF overlay watermarks on PDFs via REST API

Watermark PDF API: Image, Text & PDF Overlay Stamps

Integrate watermark functionality into your applications via REST endpoints for stamping PDF documents. Apply image watermarks from PNG, JPG, or TIFF files. Add text watermarks with control over font, size, color, stroke, opacity, and rotation. Overlay another PDF page as a vector watermark across selected pages. Every request accepts precise placement parameters including coordinates, scale, page ranges, opacity, and clickable links. Use these endpoints to brand contracts, mark drafts as confidential, apply copyright notices, or automate batch document labeling inside your pipeline.