🧰Locly

Add Watermark to PDF

Add a text watermark to PDF pages locally

Drop a PDF here or choose a file

About This Tool

PDF Watermark stamps custom text onto every page of a PDF with controls for font size, opacity, rotation, and optional tiling. This tool only adds watermarks β€” it does not remove existing watermarks. Processing uses pdf-lib and is processed locally in your browser; your file is never uploaded.

How to Use

  1. Choose or drop a PDF (keep size reasonable for memory)
  2. Enter watermark text and adjust size, opacity, rotation
  3. Optionally enable tiling across each page
  4. Click Apply Watermark
  5. Download the stamped PDF

Common Use Cases

  • Drafts: Mark documents as CONFIDENTIAL or DRAFT
  • Contracts: Stamp REVIEW ONLY before sharing
  • Assets: Brand client PDFs with a light company mark
  • Teaching: Label worksheets for classroom use
  • Archives: Tag internal copies without a desktop suite

FAQ

Q1: Is my PDF uploaded?

No. Watermarking is processed locally in your browser and never uploaded.

Q2: Can this remove watermarks?

No. This tool only adds text watermarks. It is not a watermark remover.

Q3: Do encrypted PDFs work?

Password-protected or encrypted PDFs usually cannot be opened here β€” unlock them first.

Q4: Why does a large file fail?

Very large PDFs can exceed browser memory. Try a smaller file or fewer pages.

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