Is Add Watermark free to use?

Yes. Add Watermark is free for everyday use on pdfeditorai.com, with a daily quota covered by the free plan and unlimited usage on Pro.

Are my files uploaded to a server?

No. Add Watermark watermarking runs in your browser using a Web Worker — your PDF is never transmitted to our servers.

Does it work on mobile?

Yes. The tool is responsive and works in modern mobile browsers including iOS Safari and Chrome on Android.

What file size can I process?

Most browsers comfortably handle PDFs up to 100 MB. Very large files may be slow on low-memory devices.

Do I need to install anything?

No installation, no plugins. Open the page and start working — everything runs natively in your browser.

How do I use Add Watermark step by step?

Open the tool, drop your PDF into the workspace, choose your options, and click the action button. The result downloads to your device in seconds — no signup or upload required.

Is Add Watermark safe and GDPR-compliant?

Yes. Because watermarking happens locally in your browser, no personal data or file content is sent to pdfeditorai.com servers, which keeps the workflow GDPR- and CCPA-friendly by design.

Can I use Add Watermark without signing up?

Yes. Add Watermark works without an account for everyday volumes. Signing up only unlocks higher daily limits and saved history on Pro.

What's the difference between Add Watermark on pdfeditorai.com and Adobe Acrobat?

Adobe Acrobat is a paid desktop suite that requires an Adobe ID. Add Watermark on pdfeditorai.com is free, runs in any modern browser, and never uploads your file — so it's faster for one-off jobs and safer for confidential documents.

Does Add Watermark work offline?

After the first visit, the core Add Watermark engine is cached by your browser, so most operations keep working with no internet connection. Only features that explicitly need AI (like summarisation or chat) require connectivity.

Add a watermark to a PDF

4.8 / 5· 1,284 reviewsFree

Brand or protect every page with a custom watermark. Add Watermark runs entirely in your browser on pdfeditorai.com — no upload, no signup, free for everyday use.

Price: Free
Privacy: In-browser, no upload
Max file size: Up to 100 MB
Works on: Web, iOS, Android

Runs in your browser No upload Free

What is Add Watermark?

Add Watermark is a free, browser-based tool on pdfeditorai.com that lets you brand or protect every page with a custom watermark without uploading your file to a server. It runs entirely on your device using a Web Worker, so your PDF stays private — and there's no signup, no install, and no watermark.

Also known as: add watermark online, add watermark free, add watermark without signup, add watermark in browser.

Drop your PDF here

or click to browse · up to 5.0 MB per file

How it works

1
Open PDF
Drop your PDF into the workspace.
2
Configure watermark
Set text, opacity, rotation, and colour.
3
Download
Every page is stamped — download the watermarked PDF.

Why use Add Watermark

Custom text, font size, and colour

Adjustable opacity and rotation

Diagonal or straight orientation

Runs entirely in your browser — files never leave your device.

Common use cases

Drafts

Mark documents as DRAFT or CONFIDENTIAL before sharing.

Copyright

Watermark proofs and previews of paid work.

Branding

Add your brand name across deliverables.

Frequently asked questions

Loved by 2M+ users worldwide

Real reviews from people who use pdfeditorai.com every day.

4.8 / 5 · 1,284 reviews

“Genuinely the fastest way to merge and reorder PDFs I've found. It runs right in the browser — I don't have to wait for an upload bar to crawl across the screen.”

Sarah Martin

Operations Manager · United States

“Compresses huge design exports without trashing the image quality. I send PDFs to clients all day and this has replaced two paid apps for me.”

David Chen

Product Designer · Singapore

“The 'chat with PDF' tool reads contracts and pulls out clauses better than I expected. Big time-saver for case prep.”

Amelia Roux

Lawyer · France

“Split, rotate, OCR — all the boring stuff just works. Would love a desktop app one day, but the web version is more than enough.”

Marcus Bauer

Accountant · Germany

“OCR on scanned papers is shockingly accurate. I summarize 200-page reports in under a minute. Free tier covers everything I need.”

Priya Sharma

Researcher · India

“Clean interface, no popups, no forced signups. It just lets you work. Exactly what a PDF tool should feel like in 2026.”

Liam O'Connor

Freelance Writer · Ireland

How Add Watermark compares

Feature	pdfeditorai.com	Adobe Acrobat	iLovePDF / Smallpdf
Runs in your browser	Yes	No — desktop install	Uploads to server
Free to use	Yes	Paid subscription	Daily limits, paywall
Privacy (no upload)	Yes	Local	Files leave your device
No signup required	Yes	No — Adobe ID	Often required
Works on mobile	Yes	Mobile app	Limited
Batch processing	Yes	Pro plan only	Pro plan only
Max file size	~100 MB in browser	Unlimited	25 MB free / 200 MB paid
Output quality	Lossless	Lossless	Recompressed

Topics this tool covers

Searches and use cases Add Watermark is designed to answer.

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Ready to try Add Watermark?

Drop your PDF above and you're done in seconds — no upload, no signup.

Browse all tools

Add a watermark to a PDF

What is Add Watermark?

Drop your PDF here

How it works

Open PDF

Configure watermark

Download

Why use Add Watermark

Common use cases

Drafts

Copyright

Branding

Frequently asked questions

Loved by 2M+ users worldwide

How Add Watermark compares

Topics this tool covers

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Ready to try Add Watermark?