Add a watermark to your PDF
To add watermark to PDF means stamping text — such as “Confidential”, “Draft”, or a company name — across the pages of a document. A watermark marks ownership, signals a document's status, and discourages unauthorised reuse. pdfEditor lets you add text watermark to PDF in your browser with full control over how it looks, and download the stamped file right away.
It is a free PDF watermark tool with no signup and no cap on how many documents you process. You type your text, adjust a few sliders, and every page is stamped consistently.
Why watermark a PDF?
Watermarks serve both practical and protective roles. Businesses stamp proposals and reports as “Draft” or “For Review” so no one mistakes a work in progress for the final version. Photographers, designers, and consultants overlay their name to protect samples they share. Legal and HR teams mark sensitive files “Confidential” so their handling requirements are obvious at a glance.
Doing this online is convenient, but a document you are trying to protect should not have to be uploaded to a stranger's server first. A client-side watermark PDF online tool solves that — you get to stamp PDF online free while the file stays on your own machine. Image watermarks (such as a logo) are on the roadmap; today the tool focuses on flexible text watermarks with opacity and rotation control, and support to add image watermark PDF is coming in a future update.
How to watermark a PDF online free
- Upload your PDF. Select the document you want to stamp.
- Configure the watermark. Type your text, then set the position, opacity, rotation angle, and font size. A live preview shows exactly how it will appear.
- Apply and download. Click “Add Watermark” to stamp every page, then save your watermarked PDF.
No account is required, so you can watermark PDF no login from the first click to the download.
Frequently asked questions about PDF watermarks
Is this add watermark PDF free? Yes — a fully add watermark PDF free tool with no subscription and no per-day limit.
Does the watermark appear on every page? Yes. Your settings are applied uniformly across all pages of the document.
Can I control how visible it is? Yes. The opacity slider lets you make the watermark a faint background mark or a bold, prominent stamp.
Do I need to sign in? No login or account is needed at any point.
Stamped privately in your browser
Watermarking is performed entirely in your browser — your PDF is never uploaded to a server or stored anywhere online. The document is read from your device, the watermark is drawn locally, and the result is written straight back, so even confidential files never leave your computer. That matters most for exactly the kind of documents people watermark: drafts, proposals, and sensitive records. With no upload involved, there is no server-side copy to secure and nothing left behind once you close the tab.
Designing an effective watermark
A good watermark is legible enough to read but subtle enough not to obscure the content beneath it. For status labels like “Draft” or “Confidential”, a diagonal angle of roughly 45 degrees and a moderate opacity work well — the mark reads clearly without fighting the text. For ownership marks on samples you share publicly, a higher opacity and a central position make the watermark harder to crop out.
Font size matters too: a mark that spans the width of the page is far more tamper-resistant than a small stamp in a corner. Use the live preview to balance visibility against readability before you apply, and remember that once the watermark is embedded it becomes part of the page, so keep an unwatermarked original for your own records.