About this tool

Watermark PDF — add a text or image stamp, free and private

Add a watermark to a PDF — a CONFIDENTIAL or DRAFT stamp, your own text, or a logo — without handing it to a third-party website. The whole thing runs in your browser, so no document contents are sent to PaperFit.

How to add a watermark to a PDF

  1. Drop your PDF into the box above, or click to choose a file.
  2. Type your watermark text (or pick a preset like CONFIDENTIAL or DRAFT), or upload an image to use as the stamp.
  3. Set the placement — diagonal, tiled, or a custom corner — plus opacity and rotation, and choose which pages to stamp.
  4. Click Apply — the watermark is burned in locally, in your browser.
  5. Download the watermarked PDF. No document contents are sent to PaperFit.

What it does

  • Text or image watermarks, with ready-made presets like CONFIDENTIAL, DRAFT, and DO NOT COPY
  • Diagonal, horizontal, tiled, or custom corner placement, with adjustable opacity and rotation
  • Apply to every page or only the pages you choose, with a live preview before you export
  • No watermark from us, no sign-up, no document contents sent to PaperFit

Common uses

  • Marking a contract or proposal CONFIDENTIAL before sharing it
  • Stamping DRAFT across a report so no one mistakes it for the final version
  • Adding a company logo to every page of a document for branding

Is it private?

Yes. Unlike most "watermark PDF online" tools, PaperFit processes your file on your device, and no document contents are sent to PaperFit. The stamp is applied on your own device using your browser, which matters here because the documents people watermark — contracts, drafts, internal reports, signed agreements — are exactly the ones you do not want sitting on someone else's server. You can confirm it: open your browser's network tab and watch — no document contents are sent to PaperFit while you add the watermark.

Frequently asked questions

Are my files uploaded to a server?

No. The watermark is applied in your browser. No document contents are sent to PaperFit, so there is nothing for us to see or store.

Can I use my own logo or image as the watermark?

Yes. You can stamp custom text or upload an image, such as a company logo, and scale it to fit the page.

Can I watermark only some pages instead of all of them?

Yes. You can apply the watermark to every page or pick a specific page range, with a live preview before you export.

Will the watermark cover up my text?

You control the opacity, so a light, semi-transparent stamp keeps the underlying text readable. Tiled and diagonal layouts spread it across the page without blocking content.

Is it free and do I need an account?

Yes, it is free with no sign-up, no install, and no charge — and we never add a watermark of our own to your file.

Is there a file size limit?

You can watermark PDFs up to 200 MB. If your PDF is password-protected, unlock it with the Protect tool first, then add the watermark.

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