Watermark PDF - Permanent Branding & Stamps
Protect your documents with custom watermarks. Add text watermarks with full control over appearance.
Drop your PDF here or click to browse
Supports PDF files
About PDF Watermarks
- •Add custom text watermarks to protect your documents
- •Customize text, color, size, and opacity
- •Watermark is applied to all pages automatically
- •100% free - no watermarks on your watermarks!
About PDF Watermark Tool
Add professional, unremovable watermarks to your PDF files with Convertify. Whether you need an opaque 'CONFIDENTIAL' stamp or a subtle 'Soft Brand' logo, our tool allows you to control opacity and position with precision. Use our 'Injection' technology to flatten watermarks into the document layer, making them significantly harder to remove than standard overlays.
Why Use Convertify's PDF Watermark Tool?
Text or Image
Stamp custom text or upload your logo
Position Control
Tile, center, header or footer placement
Drafts Stay Private
Watermarking happens on your device
Opacity Slider
From subtle to bold with a single drag
Common Use Cases
- 1Adding 'CONFIDENTIAL' stamps to sensitive reports
- 2Branding architectural drawings with company logos
- 3Marking draft versions of manuscripts for review
- 4Adding copyright notices to creative portfolios
- 5Stamping archive documents with Bates numbering or dates
Convertify processes all files directly in your browser — nothing is uploaded to any server. Your documents stay private and secure on your device at all times.
The complete guide to PDF Watermark Tool
Last updated June 1, 2026Watermarking a PDF signals ownership, confidentiality, or draft status — 'CONFIDENTIAL', 'DRAFT', a company name, or a copyright notice — printed diagonally across every page so it's clearly visible but the underlying content remains readable. Convertify's Watermark PDF tool adds text watermarks in your browser with full control over text, opacity, font size, angle, and color.
Watermarks serve two practical purposes: deterring unauthorized distribution (the watermark identifies the original recipient if a confidential document leaks) and signaling document status (DRAFT watermarks prevent recipients from acting on preliminary content as if it were final).
Text watermarks added by Convertify are overlaid as PDF text objects — they scale cleanly on any screen and in print, unlike image-stamp watermarks which can appear pixelated at high zoom or print resolution.
How PDF Watermark Tool on Convertify compares
| Feature | Convertify | Typical online tool |
|---|---|---|
| Files uploaded | Never | Yes |
| Opacity control | Yes (0–100%) | 3 presets only |
| Color choice | Any hex color | Gray only |
| Angle control | Diagonal or horizontal | Diagonal only |
| Daily limit | Unlimited | 3 per day |
| Watermark type | Text (scalable) | Image stamp |
Step-by-step: how to use PDF Watermark Tool
- 1
Upload the PDF
Drop the PDF onto the upload zone. All pages will be watermarked.
- 2
Configure the watermark
Type the watermark text (e.g. 'CONFIDENTIAL', 'DRAFT', your company name). Set opacity (30-40% is readable-but-subtle; 60-70% is bold and deliberate). Choose diagonal or horizontal, font size, and color.
- 3
Apply and download
The watermark is added to every page. The download is immediate with no server processing.
Real-world scenarios
CONFIDENTIAL distribution of sensitive reports
Finance teams distributing pre-release earnings data to selected recipients can personalize each PDF: watermark with the recipient's name ('CONFIDENTIAL — John Smith'). If the document leaks, the watermark identifies who shared it.
DRAFT documents for review cycles
Send a contract or policy document for review with a prominent DRAFT watermark. Recipients know not to countersign or act on a document clearly marked as preliminary.
Copyright protection for published PDFs
Authors, photographers, and consultants distributing paid content watermark with their name and website. Combined with a print restriction from Protect PDF, this makes unauthorized redistribution identifiable and harder to strip.
Sample versions of paid documents
Businesses offering PDF samples watermark with 'SAMPLE — purchase at [URL]'. The content is visible enough to evaluate but branded clearly enough to be unsatisfying as the full product.
Troubleshooting and edge cases
Can the watermark be removed?⌄
Text watermarks are embedded as a PDF object layer. A skilled user with the right tools can remove them — watermarks are a deterrent, not a cryptographic lock. For high-security documents, combine watermarking with AES-256 password protection and owner restrictions.
The watermark is too dark and obscures the content.⌄
Reduce opacity to 20-30%. For a subtle but legally-defensible mark, 25% opacity in light gray is standard for legal documents. Bold DRAFT or CONFIDENTIAL marks typically use 40-50%.
I want a watermark only on specific pages.⌄
The current tool applies the watermark to all pages. Workaround: split the PDF to isolate the pages you want watermarked, apply the watermark, then merge the watermarked section back with the non-watermarked sections.
My PDF is in landscape — the diagonal text doesn't look right.⌄
Use horizontal alignment for landscape pages. The diagonal setting is optimized for portrait pages.
How to Add Watermark to PDF - Step by Step Guide
Upload
Select the PDF file(s) you want to brand.
Design
Add text or logo, adjust opacity and rotation.
Inject
Apply the watermark permanently and download your file.