How do I add a watermark to a PDF for free?

Upload the PDF, type your watermark text, set the opacity, then click Add watermark & download. Runs in your browser.

Can I control how visible the watermark is?

Yes — the opacity slider goes from faint to bold.

Any short label up to 60 characters, like CONFIDENTIAL or DRAFT.

No — the watermark is added locally in your browser on scantext.net.

What do you need?

Watermark PDF

Processed on your device when possible · Enhanced scan deletes files in ~60s

Drop a PDF to add a watermark

Processed in your browser · no signup

Stays on your device — we do not upload your images.

1Upload your file(s)
2Choose options if needed
3Download — stays on your device

About this tool

Watermark PDF answers searches like add watermark to pdf free, stamp confidential on pdf, watermark pdf online, and mark a document as draft. ScanText at scantext.net draws your text — CONFIDENTIAL, DRAFT, your name, anything up to 60 characters — diagonally across every page at an opacity you control, then lets you download the marked file, all in your browser. It's the quick way to label a contract before review, protect a portfolio you're sharing, or mark internal copies so they aren't mistaken for the final version. The watermark is layered over your original pages without changing the underlying content. Nothing is uploaded to our servers, there is no signup, and no extra branding added to the output.

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Frequently asked questions

: Upload the PDF, type your watermark text, set the opacity, then click Add watermark & download. Runs in your browser.

About this tool

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Frequently asked questions