Add Watermark to PDF
Add watermark to PDF online free with custom text, color, opacity, and rotation. Protect your files instantly with secure, high-quality watermarking.
Add Watermark to PDF - Free Online Tool for Text and Image Watermarks
Sending out a proposal, a report, a contract draft, or a design proof without any watermark on it is a risk most people don't think about until something goes wrong. A document shared without protection can be forwarded, reprinted, or passed off without context. A watermark doesn't prevent all of that - but it makes ownership clear and stops casual misuse before it starts.
This free tool lets you add watermark to PDF online without installing anything or opening a paid application. Upload your PDF, set your watermark - text or image, with full control over size, colour, opacity, rotation, and position - and download the protected file in seconds.
Works on files up to 100 MB. Supports text watermarks with custom fonts and colours, and image watermarks with transparent PNG logos. Files are deleted from the server after one hour. No account needed.
Why Watermarking a PDF Before You Share It Matters
Most documents leave your hands the moment you hit send - and after that, you have no control over what happens to them. A proposal gets forwarded to a competitor. A draft report gets shared before it's final. A design proof gets screenshotted and used without approval. None of these things are hypothetical. They happen regularly to freelancers, agencies, consultants, and businesses of every size.
A watermark on a PDF signals ownership without being aggressive about it. "CONFIDENTIAL", "DRAFT", "FOR REVIEW ONLY", a company logo at 30% opacity across the centre - any of these tell the recipient that the document belongs to someone and that sharing or reproducing it without permission isn't appropriate. For client-facing documents especially, it sets a professional tone from the moment they open the file.
Adobe Acrobat can do this but it costs money and most people don't have it. Paying for a tool just to add text watermark to PDF once or twice a month makes no sense when a free browser-based tool does exactly the same job.
What the SM Calculators PDF Watermark Tool Does
Upload any PDF up to 100 MB and choose between two watermark types. Text watermarks let you type any phrase - "CONFIDENTIAL", "DRAFT", your company name, whatever fits - and then customise the font size, colour, opacity, and rotation angle. Image watermarks let you upload a PNG or JPG file, typically a company logo, and set the scale, opacity, and rotation the same way.
Position is set from a nine-point grid: top left, top centre, top right, centre left, dead centre, centre right, bottom left, bottom centre, bottom right. Apply it to all pages, odd pages only, even pages only, or the first page only - useful for multi-page documents where you don't need a watermark on every single page.
A live preview shows how the watermark looks on the page before anything is applied. Adjust until it looks right, click Apply Watermark, and the finished PDF is ready to download. The formatting of the original document stays intact - fonts, images, tables, and layout are all preserved exactly as they were.
How to Add a Watermark to a PDF - Step by Step
What This Tool Gets Right
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Text and Image Watermarks
Both types are fully supported. Type a custom text phrase or upload a logo PNG. Each has its own controls for size, opacity, and rotation so you get exactly the look you need without compromise.
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Full Customisation Controls
Font size, colour, opacity, rotation, position, and which pages to stamp - every setting is adjustable. Not a one-size-fits-all watermark tool. If the diagonal grey "CONFIDENTIAL" look is what you need, that's two clicks. If a centred logo at 20% is more appropriate, that works too.
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Live Preview Before Applying
A visual preview updates as you adjust settings. Check the positioning, opacity, and size before committing. Saves the back-and-forth of applying, downloading, checking, and restarting.
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Page Selection Options
Apply to all pages, odd pages, even pages, or just the first page. Useful for reports where you want a watermark on the cover but not on every appendix page, or contracts where selective stamping makes more sense.
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Files Deleted After One Hour
Uploaded PDFs are removed from the server after 60 minutes. Nothing is stored beyond that window. For documents containing sensitive information - contracts, financials, client data - that's worth knowing before you upload.
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Free, No Login, No Limit
No subscription, no account, no cap on how many PDFs you can watermark. This free PDF watermark tool is open to anyone on any device at no cost.
Text Watermark vs Image Watermark - Which One to Use
Both watermark types are available in this tool and both serve different purposes. Picking the right one depends on what the document is for and what impression you want to leave with the person receiving it. Here's a quick comparison to help you decide before you upload.
| Watermark Type | Best For | Typical Use Case |
|---|---|---|
| Text - CONFIDENTIAL | Internal documents, legal files, sensitive reports | HR documents, financial reports, legal contracts |
| Text - DRAFT | Documents shared for review before final approval | Proposals, briefs, reports sent for client feedback |
| Text - FOR REVIEW ONLY | Work shared with third parties not authorised to retain it | Design proofs, editorial documents, content previews |
| Text - Company Name | Branded documents that need ownership clearly marked | Research papers, whitepapers, presentations, reports |
| Image - Logo PNG | Professional branded documents and client deliverables | Agency deliverables, proposals, portfolios, invoices |
💡 Pro Tip - For logo watermarks, use a transparent PNG file and set opacity between 30% and 40%. That range keeps the watermark clearly visible without making the document hard to read. Rotation at -45° across the centre of the page is the industry standard for confidential documents - it's harder to crop out and catches the eye without dominating the page.
Who Uses This Tool the Most
Freelancers & Consultants
Sending proposals, strategy documents, or deliverables to clients without any form of protection is common and risky. A "DRAFT" or "FOR REVIEW ONLY" watermark on documents shared before final sign-off takes thirty seconds to add and makes the status of the document immediately clear.
Agencies & Creative Studios
Design proofs, copy drafts, and creative concepts shared with clients before approval need watermarks. This add image watermark to PDF online tool handles logo watermarks on client-facing documents in seconds, without opening Acrobat or InDesign for a task that shouldn't require either.
Legal & Finance Professionals
Contracts, financial statements, and legal documents shared for review need to be clearly marked as drafts or as confidential. A visible "CONFIDENTIAL" watermark at 50% opacity across every page leaves no ambiguity about how the document should be treated.
Educators & Academic Institutions
Exam papers, unpublished research, and course materials distributed to students often need watermarking before release. Adding an institution name or a "NOT FOR DISTRIBUTION" text watermark protects the document without requiring any specialist software.
Small Business Owners
Quotes, invoices, product catalogues, and brochures sent out to prospects represent real business assets. Watermarking them with a company name or logo takes under a minute and makes the document look more professional while marking it as yours.
Why Use This Instead of Adobe Acrobat or Other Paid Tools
Watermark Your PDF in Under Two Minutes - Free
Sending out a document without a watermark is a habit most people regret at some point. Upload your PDF, set the text or logo watermark exactly how you want it, and download the protected file. No software, no subscription, no hassle.
Add Watermark to PDF Free →Translate any PDF into 60+ languages while keeping the original layout. Powered by AI - always free.
Try It Free →Use a transparent PNG logo at 30–40% opacity for the most professional-looking branded watermark. Diagonal placement at −45° is the industry standard.