Forum Discussion
How can I add watermarks to PDF documents in batch on my win 11?
I'm looking for a way to add watermarks to multiple PDF documents in batch. I often need to process several documents at once, branding them with either my company's logo or some text before sending ...
My advice is not using the online tools to add watermark to pdf. This is not a good way to this!
Technical Limitations of Online PDF Watermark Creator
Most free online PDF watermarking tools have obvious technical flaws:
- Poor format compatibility: cannot perfectly support transparent background PNG format watermark Logo, resulting in fuzzy edges or color distortion;
- Weak batch processing capacity: a single time can only handle a small number of pages, if you need to add watermarks in bulk need to repeatedly upload files, the efficiency is extremely low;
- Unstable output quality: the resolution of some tools decreases after compression of the image, and even misplaced text, chaotic layout and other problems.
Risks for Using Online PDF Watermark Creator
Using the online tool involves uploading PDF and Logo files to a third-party server, which poses the following risks:
- Risk of data leakage: Sensitive content (e.g. business documents, personal privacy information) may be stored or misused;
- Advertisement Interference: Some tools are forced to insert pop-up advertisements, or even induced to download bundled software;
- File size limitations: the free version usually limits the size of a single file (such as 50MB), large-capacity PDF need to pay or segmentation processing, cumbersome operation.
It is recommended to prioritize the choice of local software or open source command-line tools for adding watermark to PDF file, taking into account the security and controllability.