The concerns regarding privacy when using the online tool PDF24 to add watermarks to PDF files are of significant importance. It can affect individuals and businesses that have sensitive information in their PDF documents. Many fear that their uploaded files are stored on the tool's servers and could potentially be used for unwanted purposes. In addition, there are concerns about the data transfer, as it is not clear whether it is secure and whether the files can be intercepted by third parties during transmission. There is also concern that the once uploaded and processed files may not be completely deleted from the servers of the online tool. Therefore, the security and confidentiality of the documents when adding watermarks via this online tool is a major concern.

PDF24 Tools places the highest value on data security and ensures safe use of the online tool for adding watermarks. When you upload your files, a secure SSL connection is used to protect the data transfer from third-party access. After the processing is complete, all uploaded data is automatically and completely deleted from the servers to ensure privacy. PDF24 Tools does not store any personal data and operates a strict privacy policy. It is a data protection-compliant and trustworthy service that effectively addresses concerns about privacy and data security. It provides individuals and businesses with a secure environment for adding watermarks to their PDF files. This allows the protection of sensitive information and the personalization of PDF documents without the risk of unwanted use of data. Thus, PDF24 Tools is a safe and reliable tool for manipulating PDF files.