PDF Watermark Add & Remover (Stamp / Sign)

Stamp & Remove

Bidirectional watermark and signing suite for agreements, invoices, and proposals. Stamp text markers (CONFIDENTIAL, DRAFT), seal transparent signature PNGs, or strip existing watermarks via smart stream parsing.

All Tools

Interactive Tool Console

Client-Side Execution • Runs in browser

Your PDFs never leave your device. Watermarking and removal happen 100% locally in your browser.

Guest Quota: 2/2

Select or Drag & Drop PDF to Watermark

Contracts, invoices, or copyright documents

Live API Integration Public Edge API

Call this tool in your codebase or backend services directly via REST API.

curl -X POST "https://findfreeapi.com/api/v1/tools/pdf-watermark-sign" \
  -H "Content-Type: application/json" \
  -d '{"text":"CONFIDENTIAL"}'

POST/api/v1/tools/pdf-watermark-sign

No API Key Required (Public Edge)

Key Standards & Highlights

Stamp diagonal or horizontal text watermarks across all document pages

Cleanly excise and remove existing text watermarks using smart stream parsing

One-click quick presets: CONFIDENTIAL, DRAFT, PAID, DO NOT COPY

Embed transparent PNG signatures and organizational stamps on final pages

Precise control over opacity, angle, color, and font scale

Frequently Asked Questions

Does stamping a watermark distort the original layout?

No. Watermarks and signature stamps are injected as a non-destructive overlay layer, leaving your original text and page formatting intact.

What image format is best for digital signature stamps?

Transparent PNG format is recommended to ensure your organizational seal or handwritten signature blends seamlessly onto the document.

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Cloudinary

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AWS S3

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