Watermark PDF Online
Add a custom text watermark to every page of your PDF. Protect your documents, proposals, reports and e-books with a clear, semi-transparent label in just a few clicks.
Free Online PDF Watermark Tool
The Watermark PDF tool from ConvertFree.net lets you stamp your documents with a clear, professional text watermark in seconds. Instead of opening a heavy desktop editor or paying for premium plugins, you can upload any supported PDF, type your watermark text and apply it to every page in a single pass. This is ideal for proposals, contracts, invoices, reports, e-books and course material that you want to share while clearly marking them as confidential, draft or branded content.
Everything runs directly on our hosting using the Imagick engine. Your PDF is rendered page by page, the watermark is drawn on top and a new PDF is generated without sending your file to any external conversion API. You can choose where the text appears – center, corners or bottom edge – and control both the base font size and opacity. Center mode uses a slightly diagonal style across the page, which is easy to see on printed copies and screenshots but still subtle enough not to block the underlying text completely.
This PDF watermark tool works smoothly with the rest of the ConvertFree.net ecosystem. If your file is very large, you can first reduce its size with Compress PDF. When you only want to watermark part of a document, use Split PDF to isolate certain page ranges or Reorder PDF pages to organize your content before stamping. You can also adjust orientation with Rotate PDF so that the watermark always appears on correctly aligned pages.
For hybrid workflows that involve both PDFs and images, you can export pages with PDF to JPG or PDF to PNG, watermark those images using the Image watermark tool, resize with Image resizer and then rebuild everything as a document via JPG to PDF or PNG to PDF. All tools share the same clean layout, drag-and-drop uploads and no-watermark output, which makes ConvertFree.net a convenient hub for day-to-day office and creative tasks.
The site structure is optimized for fast loading, clear internal linking and ad placements that work well with Google AdSense policies. There are no forced registrations, no third-party watermarks and no confusing bloat – just a focused PDF watermark tool that you can bookmark and reuse every time you need to brand or protect your documents before sharing them online.
Watermark PDF – Frequently Asked Questions
How do I add a watermark to a PDF on ConvertFree.net?
Upload your PDF, enter the watermark text, choose the position, font size and opacity, then click “Add watermark to PDF”. ConvertFree.net processes each page on its own servers and returns a new watermarked PDF you can download instantly.
Will the watermark appear on every page of my PDF?
Yes. The tool applies the same text watermark to every page in the document. This keeps the protection consistent, whether your PDF has just a few pages or a longer report, manual or e-book.
Can I control the position and transparency of the watermark?
You can choose between center, top or bottom corners and adjust font size and opacity. Center mode uses a diagonal-style watermark across the page, while corner positions use a regular horizontal label. The opacity slider helps you keep the text readable without overpowering the document content.
What is the maximum PDF size supported?
The current limit is 80 MB per PDF, which is suitable for most reports, proposals and manuals. If your file is larger, you can first reduce it with Compress PDF or split it into parts using Split PDF and then apply the watermark to each section.
Are my PDFs safe and deleted automatically?
Your documents are processed only on ConvertFree.net servers and never sent to external conversion APIs. An automated cleanup job regularly removes old uploads and watermarked files from our storage folders, so your PDFs are not kept longer than necessary.