100% secure — files never leave your browser
Yes — PDF Guru is completely safe for merging PDFs. Unlike other online tools that upload your files to remote servers, our merger processes everything locally in your web browser using JavaScript. Your files never leave your device, never travel over the internet, and are never stored on any server. This makes it safe for merging confidential contracts, financial documents, medical records, legal files, and sensitive business documents. We don't collect any data about your files — no filenames, no content, no metadata. Merge with complete confidence.