Security & privacy

Every PDF tool on PDFLark runs entirely in your web browser using JavaScript. When you drop a file onto PDFLark, it is read directly from your local storage into your browser's memory. The processed result is written back to your memory and then downloaded directly to your device.

At no point does any file content pass through a PDFLark server, third-party cloud storage, or any external service.

PDFLark uses two open-source libraries that run inside your browser:

• pdf-lib — creates and modifies PDF documents in JavaScript • PDF.js — renders PDF pages to images (used for PDF → JPG conversion)

Both libraries are bundled with the PDFLark application and loaded once when the page opens. After that, everything runs offline — you could disconnect from the internet and the tools would still work on files you've already opened.

PDFLark uses privacy-friendly analytics (Plausible.io, when active) which does not use cookies, does not track individuals, and does not send any user data to third parties. Page view counts help us understand which tools are most useful so we can improve them.

You do not need to accept any cookie banner to use PDFLark.

PDFLark does not use cookies for core functionality. If you access PDFLark while logged into a future paid account, a session cookie will be used only for authentication. No advertising or tracking cookies are used.