title: "Verify a PDF Tool's Privacy Claims With DevTools in 5 Minutes"
description: "Stop trusting the marketing. Open the Network tab, run one merge, and see whether the file actually leaves your device. Full walkthrough with the common misreads."
tags: ["privacy", "webdev", "devtools"]
canonical_url: https://pdfmergenext.shop/blog/devtools-network-tab-privacy-guide
"Files never leave your device" is the most common privacy claim in the PDF tools space, and the most untested. You do not need to believe it or distrust it, you can verify it in five minutes with the tools already in your browser.
