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

Upload your PDF, type the watermark text, choose position, set opacity and font size, then click 'Add watermark'. The watermarked PDF downloads instantly — all processing happens in your browser with no upload to any server.

Can I add a CONFIDENTIAL or DRAFT watermark to a PDF without software?

Yes. Askerium's PDF watermark tool lets you add any custom text — 'CONFIDENTIAL', 'DRAFT', 'SAMPLE', your company name — directly in your browser. No PDF software, no desktop app, no account required.

Does the PDF watermark tool change the original file?

No. The original file is never modified. The tool reads your PDF in the browser, creates a new watermarked copy in memory, and offers that copy for download. Your source file stays exactly as it was.

What position options are available for PDF watermarks?

You can place the watermark at the center (diagonal rotation), bottom-right, bottom-left, or top-right of every page. The center diagonal position is the most common for confidentiality watermarks.

Is the PDF watermark tool free and private?

Yes — completely free, no account needed, and your PDF never leaves your browser. All processing uses client-side JavaScript with pdf-lib, so your sensitive documents remain private.

PDF watermark

PDF Watermark

Add a custom text watermark to every page of a PDF. Choose position, opacity, and font size — all in your browser.

Your files are processed locally and never uploaded to our servers.

Drop a PDF here

or click to browse

How it works

1
Upload your file
Drop your file or click to browse. No size limit.
2
Convert instantly
Processed in your browser — nothing is uploaded to any server.
3
Download the result
Your converted file is ready in seconds.

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