PDFPerch All tools

Edit PDF

Add a watermark to PDF

Protect your document with a text or image watermark. Everything runs locally in your browser.

Your PDF never leaves this browser

User guide

How to use Add PDF Watermark

Overlay text or a PNG/JPEG watermark on every PDF page while retaining underlying PDF content.

  1. 1

    Upload the PDF.

  2. 2

    Choose text or image watermark mode.

  3. 3

    Set size, color, opacity, angle, and scale while checking the preview.

  4. 4

    Generate and download the watermarked document.

Best for

  • Draft and confidential labels
  • Branding client proofs

Important limitation

Emoji and CJK text require an embedded font containing those glyphs; very low opacity may be hard to see in print.

Frequently asked questions

Does the watermark replace existing text?

No. It is drawn as an additional page layer.

Which image formats work?

Use PNG for transparency or JPEG for smaller photographic marks.

PDFPerch processes files locally unless this guide explicitly identifies a cloud-dependent feature. Always keep an original copy and verify critical output before submission, printing, signing, or accounting use.