Add a text watermark to your PDF files directly in your browser. Choose the text, color, opacity, rotation, and position — no upload, no sign-up required.
Upload your PDF, enter the watermark text you want (e.g. CONFIDENTIAL, DRAFT, SAMPLE), and customize the color, size, opacity, and rotation. Choose to apply it to all pages or just the first page, then download your watermarked PDF instantly.
Yes. This tool processes everything locally in your browser. Your PDF is never uploaded to any server, so your documents stay completely private.
No. This tool runs entirely in your browser using JavaScript. Your PDF file is never uploaded, stored, or sent anywhere - it stays on your device the whole time.
Currently, password-protected or encrypted PDFs cannot be processed. Please remove the password first using a PDF unlock tool, then upload it here.
You can upload PDF files up to 25MB. Larger files may not process correctly depending on your device and browser.
You can choose to apply the watermark to all pages or only the first page. Watermarking a custom range of individual pages is not currently supported.
No. The watermark is added as vector text directly onto each page, so the original PDF content is not compressed, rasterized, or otherwise degraded.
Currently only text watermarks are supported. Image or logo watermarking may be added in a future update.
Yes, the Watermark PDF tool is completely free with no sign-up, no watermark on the tool itself, and no usage limits.
Yes, the tool works on modern mobile browsers. For very large PDFs, processing may be slower on phones compared to a desktop computer.
No, this tool only adds watermarks. Once a watermark is added and the PDF is downloaded, it becomes a permanent part of that file and cannot be removed by this tool.
Since nothing is uploaded or saved on any server, closing the tab will discard any unsaved progress. Make sure to download your watermarked PDF before leaving the page.