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Everyday online tools

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PDF Tools · Private, local processing

Add a Watermark to PDF

Add a text watermark to every page in your PDF without uploading the file.

PDF files up to 50 MB each and 100 MB combined. Files stay on this device; no upload or account is required.

This tool runs in your browser. Very large or damaged PDFs may exceed available device memory; password-protected PDFs are not supported.

Free online tool

How to use Add a Watermark to PDF

Add a subtle diagonal text watermark to each page of a PDF. Enter a short label such as Draft, Sample, or Confidential. Select a PDF document. Enter the watermark text. Apply the watermark, review the updated PDF preview, and download the marked document. Short phrases are easier to read across a page.

How it works

  1. Select a PDF document.
  2. Enter the watermark text.
  3. Apply the watermark, review the updated PDF preview, and download the marked document.

Examples and common errors

Typical task

Input or situation

Select a PDF document.

Expected result or advice

Add a subtle diagonal text watermark to each page of a PDF. Enter a short label such as Draft, Sample, or Confidential.

Check before processing

Input or situation

Short phrases are easier to read across a page.

Expected result or advice

Apply the watermark, review the updated PDF preview, and download the marked document.

Frequently asked questions

Can I choose different watermark text?

Yes. Enter any phrase up to 80 characters before applying the watermark.

Can I preview the watermarked PDF before downloading?

Yes. After applying the watermark, the updated PDF appears in the preview beside the controls so you can review it before downloading.

Does the tool upload my PDF?

No. The PDF is modified locally in your browser.

Can I remove a watermark later?

This tool adds a watermark to a copy of the document. Use your original file if you need an unmarked version.