Free PDF Tool · Marks

Stamp PDF

Run pdf stamp in your browser. Free, private, no signup — your selected files are processed in your browser and are not uploaded to our server.

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Drop your file here

or click to browse from your device

Accepts: .PDF

About this Stamp PDF

Add a visible text or image stamp such as APPROVED, PAID, DRAFT, REVIEWED, or an uploaded stamp image to selected pages or all pages with our pdf stamp tool.

Text stamps are drawn as PDF text using the selected color, opacity, rotation, layout, and position. Image stamps are embedded as PNG/JPG overlays.

Your privacy is the default. Your selected files are processed in your browser and are not uploaded to our server; all processing happens client-side using browser PDF libraries such as pdf-lib and PDF.js where needed. Closing the tab clears the working session from this page; downloaded files remain on your device.

This tool is free to use with no signup required. Large files may be limited by your browser’s memory and device performance. Part of PDF Tools Base, a privacy-first collection of 161 PDF utilities. Bookmark the page for next time, and explore related tools in the footer below.

How to use the Stamp PDF tool

  1. Drop your PDF.
  2. Choose text or image stamp mode, then set opacity, rotation, layout, position, and optional page range.
  3. Click Process and download the stamped PDF.

Why use PDF Tools Base?

100% Browser-Based

Stamp PDF processes selected files in your browser. Your selected files are processed in your browser and are not uploaded to our server.

No Server Upload, No Signup

Your selected files are processed locally in your browser. No account, no server upload, no email needed.

No extra branding

The output contains only the watermark or stamp you choose; PDF Tools Base does not add separate branding.

Free to Use

No accounts and no signup. Use the tool as much as you need within reasonable browser limits.

Works on Every Device

Windows, Mac, Linux, iPhone, iPad, Android, Chromebook. Any modern browser.

Built on Open Source

Powered by browser-side PDF libraries such as pdf-lib and PDF.js, depending on the operation.

Common uses for pdf stamp

Approval stamp

Mark documents APPROVED or REVIEWED.

Paid stamp

Stamp invoices PAID once settled.

Draft / status

Flag a file as DRAFT or FINAL.

Date / received

Add a RECEIVED or dated status mark.

Frequently asked questions

Is Stamp PDF safe to use?

Yes. Everything happens in your browser. Your selected files are processed in your browser and are not uploaded to our server. Closing the tab clears the working session from this page; downloaded outputs remain on your device until you delete them.

Do I need to register or sign in?

No. No account, no email, no sign-up. Open the page and start using the tool immediately. Free to use, no signup needed.

Does PDF Tools Base add its own branding?

No. The output contains only the watermark or stamp you choose; PDF Tools Base does not add separate branding.

Is there a file size limit?

There is no fixed limit. Files are processed in your browser, so RAM, page count, and file complexity affect what is feasible. Phones may struggle with large PDFs; try splitting first or use a desktop browser.

Does this work on mobile devices?

Yes. The tool works on all modern mobile browsers: Chrome on Android, Safari on iOS, Firefox, Edge, Brave. The drag-and-drop also accepts files from your phone’s file manager.

Will the stamp appear in front of or behind the PDF content?

Browser-side output is overlay-only: it is drawn in front of the original PDF content using your selected opacity, rotation, layout, and position. True behind-content watermarking is not supported here.