QBMFX Add PDF watermark
Mark a PDF copy with text such as DRAFT, SAMPLE or a shop-specific note before sharing it. Choose an appropriate font size and opacity, then inspect pages containing photographs, signatures and dense tables. A watermark can communicate document status, but the visible label should never be treated as encryption, access control or a guarantee against copying.
Choose your files and review the settings.
Keep originals and inspect the result before printing. File changes clear previous downloads. Heavy image and OCR work can take longer on a phone.
Using Add PDF watermark
- Choose a PDF and enter the watermark text.
- Set text size, position and opacity.
- Generate the marked copy and check its readability.
Behind the result
The tool draws additional visible text on each page. Opacity controls the strength of that added text relative to the content already on the page.
Free tools for everyday work
Book centers, photocopy shops, freelancers and developers can use this workspace without a paid plan or account. Files are processed locally. Prepare website resources from offline setup before disconnecting; Urdu/OCR also needs the separate pack above.
The Windows app currently includes the original four tools. These new Book Center tools are available on the website; app and extension updates will be separate releases.
Answers and practical details
Document protection
A visible watermark describes a copy’s status. It does not authenticate the document or stop another program from extracting or changing its contents.
Price and account requirements
This website tool is 100% free. No login, subscription or paid conversion tier is required. Your device supplies the processing memory.
Files and privacy
Input documents and generated results are handled locally. They are not sent to a QBMFX conversion API or stored in a customer database. Website hosting and advertising can still make separate network requests.
Offline preparation
Prepare the website resources from Help while connected, then test the required tool offline. OCR and Urdu text tools also need their optional language or font resources prepared first. Browser storage can be removed by the browser or by you.
Windows app and Edge extension
The existing installed app and extension contain the original four PDF tools. These new Book Center tools belong to the website release; they will need a separate installed-package update.