The concerns regarding privacy when using online PDF merging tools can be varied. One might feel insecure about uploading sensitive information or confidential documents to a web platform, for fear that they might fall into the wrong hands. There may also be concerns that the uploaded files are not fully or timely deleted from the provider's servers. In addition, one might worry about potential security vulnerabilities that might lead to the documents being intercepted during the transmission process. Finally, one might also have concerns that privacy is not adequately maintained if the tool does not require registration or installation.

The Merge PDF tool from PDF24 offers extensive security measures to ensure privacy and data protection. For one, the uploaded file is only kept for the duration of the merge and then immediately deleted from the server. On the other hand, the tool does not require registration or installation, ensuring your personal data remains fully protected. High-level security protocols ensure that your files cannot be intercepted or retrieved during transmission. Finally, the online software guarantees that the merged document retains the same high quality as the individual PDFs. Therefore, this tool offers a safe and easy way to merge multiple PDF files into one document. The tool is available for all common web browsers and is easy to use, to ensure maximum accessibility and user-friendliness.