Add custom text watermarks to every page of your PDF — CONFIDENTIAL, DRAFT, or any text. No upload.
Click to select or drag & drop your PDF here
Click or drag & drop. Stays on your device.
Adjust settings — browser processes locally.
Instant download. Free, no account.
PDF watermarks are used to mark documents as confidential, draft versions, samples, or internal use only. They appear across the page content, making it clear that the document is not final or should not be distributed. Businesses use watermarks on contracts, legal documents, reports and presentation drafts.
OneConvert adds the watermark text directly to the PDF page structure using pdf-lib — entirely in your browser. No upload, no server processing. Your document stays private.