Watermark PDF

New

Add a text watermark to all pages of a PDF

PDF Tools

How to Use Watermark PDF

  1. 1Upload a PDF
  2. 2Enter your watermark text
  3. 3Adjust opacity and font size
  4. 4Click Apply Watermark and download

About Watermark PDF

Watermark PDF stamps a diagonal text watermark on every page. Customize the text, opacity, and font size. The watermark is rendered at 45° in the center of each page.

Key Features of Watermark PDF

  • Fast and accurate Watermark Pdf processing
  • No installation required — works in browser
  • Free to use with no limitations
  • Privacy-focused — data never leaves your device
  • Mobile and desktop compatible
  • Instant results with live preview
  • Works on any PDF regardless of content or page count
  • No additional watermarks or branding added to output

Supported Formats

Input Formats

PDF (any version)

Output Formats

PDF (with embedded text watermark)

Only text watermarks are supported. The watermark is permanently embedded at 45° centered on each page and cannot be easily removed.

Examples

Add CONFIDENTIAL stamp to a contract

Watermark a contract PDF with "CONFIDENTIAL" before sending to external parties.

Input

Contract PDF + "CONFIDENTIAL" text, 30% opacity

Output

PDF with diagonal CONFIDENTIAL watermark on every page

Mark a document under review as DRAFT

Add a semi-transparent DRAFT watermark to a document being reviewed before final approval.

Input

Document PDF + "DRAFT" text, 20% opacity

Output

PDF with subtle DRAFT watermark visible on all pages

Common Use Cases

  • Professional Watermark Pdf tasks
  • Quick everyday calculations
  • Educational purposes and learning
  • Business and workplace productivity
  • Personal projects and hobbies
  • Adding DO NOT COPY warnings to sensitive documents

Troubleshooting

Unexpected results

Solution

Double-check your input format and ensure all required fields are filled correctly.

Tool not working

Solution

Clear browser cache and refresh. Ensure JavaScript is enabled.

Watermark does not appear on some pages

Solution

All pages receive the watermark. If some pages look different, they may have a white overlay element. Verify by opening the PDF in a different viewer.

Frequently Asked Questions

Can I customize the watermark?

Yes — enter any text and adjust opacity and size.

Is the watermark permanent?

Yes. Once added it is embedded in the PDF and cannot be easily removed.

What opacity level should I use?

For a subtle background mark that does not obstruct reading, use 15–30% opacity. For a clearly visible stamp, use 40–60%. Above 70% the watermark may obscure text and images on the page.

Can I add an image or logo as a watermark?

Currently only text watermarks are supported. Image and logo watermarks may be added in a future update. As an alternative, you can use a PDF editor for image-based watermarking.

Does the watermark appear on every page?

Yes. The same watermark text is applied to every page of the PDF without exception. There is no option to skip specific pages.

Can I change the watermark position or angle?

The watermark is always placed diagonally at 45° in the center of each page. Custom positioning, angle adjustment, and multi-position placement are not currently available.

Will adding a watermark significantly increase file size?

No. The watermark adds only a small amount of text drawing instructions to each page. For a typical PDF, the file size increase is a few kilobytes at most — negligible compared to the original.

Can I watermark a password-protected PDF?

No. The PDF must be unlocked before modifications can be applied. Use the Unlock PDF tool to remove the password, then apply the watermark to the resulting unprotected file.