Processed 100% locally
PDF Watermark
Stamp a custom text watermark perfectly centered across every page.
About PDF Watermarker
Protect your intellectual property by overlaying watermarks. Our tool lets you stamp custom text or image watermarks onto PDF pages. Choose font, opacity, rotation, and size, and download the watermarked file securely without server uploads.
Frequently Asked Questions
Upload your document, type your desired watermark text or select an overlay image, adjust rotation and opacity sliders, and click 'Apply Watermark' to download the processed file on your Mac or Windows device.
RealOnlineTools offers a free, client-side PDF watermark editor that applies only your custom overlays without forcing any company logo or branding onto your pages.
Our editor features a alignment grid selector. Simply choose the center alignment option and customize the angle to overlay your watermark text directly across the middle of each page.
Yes, it is 100% safe. The watermark stamp logic is computed locally on your device's canvas/DOM. Your sensitive documents, invoices, or books are never uploaded to external servers.