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Add custom text watermarks to PDF documents directly in your browser. Your files never leave your device.
Drag & drop your file here
or browse from your device
Customize the text, position, size, opacity, and pages.
Example: 1,3,5-8. Leave this field empty to watermark all pages.
Add a custom text watermark to your PDF documents directly in your browser. PDFConverter.io processes your files locally, so your PDFs never need to be uploaded to a server.
Add labels such as Confidential, Draft, Sample, or your company name.
Customize the available size, position, rotation, and opacity settings.
Your PDF is processed locally without being uploaded to a remote server.
The tool creates a new watermarked PDF while keeping your original file unchanged.
Choose the PDF document you want to watermark.
Type the text you want to appear as the watermark.
Adjust the available position, size, rotation, and opacity options.
Click Add Watermark and let your browser process the PDF.
Save the updated PDF with the watermark directly to your device.
Watermarks help communicate document ownership, status, branding, confidentiality, or usage restrictions. They are useful for business files, drafts, samples, reports, contracts, and internal documents.
Your PDF files remain on your device throughout the process. PDFConverter.io does not upload, store, or share your documents.
Add Watermark to PDF works with modern versions of Chrome, Edge, Firefox, Safari, and other browsers on Windows, macOS, Linux, Android, and iPhone.
Upload your PDF, enter the watermark text, choose the available style options, and click Add Watermark. The updated PDF is created directly in your browser.
No. PDFConverter.io processes your PDF entirely inside your browser. Your files never leave your device.
Yes. The watermark can be applied across the pages of your PDF document.
Yes. Depending on the available tool options, you can adjust details such as the watermark text, position, size, rotation, and opacity.
No. Your original file remains unchanged. The tool creates a new PDF containing the watermark.
Yes. You can use text such as Confidential, Draft, Sample, Approved, or your company name as a watermark.
Yes. Large PDFs are supported within your browser's available memory and your device's performance limits.
Yes. Add Watermark to PDF works on modern Android phones, iPhones, tablets, laptops, and desktop computers.
The tool works with current versions of Chrome, Edge, Firefox, Safari, and other modern browsers.
Yes. You can add a watermark to PDF files for free without creating an account.
The tool is designed to preserve the original document quality while adding the watermark layer.
Watermarks can show ownership, document status, confidentiality, branding, or usage restrictions when sharing PDF files.
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