PDF24 Tools

PDF24 Tools is a unique offering in the PDF space: a completely free, fully-featured desktop PDF editor for Windows (with an online tool suite) that is open-source and places a major emphasis on privacy and offline functionality. Created by German company Geek Software, it includes a staggering array of tools—from basic viewing and editing to OCR, conversion, compression, and advanced operations like watermarking and redaction. The desktop version processes all files locally on your computer, ensuring no data is sent to external servers. While its interface is utilitarian and not as sleek as commercial products, its zero-cost, comprehensive feature set is unparalleled.

It is an outstanding choice for privacy-focused users, cost-sensitive organizations, or anyone who needs a powerful, permanent desktop solution without any licensing fees or subscriptions.