PDF-XChange Editor is a Windows application that offers a comprehensive set of PDF features. You can view, edit, annotate, sign, OCR, and convert PDFs, and the performance is noticeably faster than many alternatives. The free version is fully functional for viewing, annotating, and basic editing, with paid upgrades unlocking advanced features like document signing, redaction, and PDF creation. The interface is customizable and supports tabbed viewing.

It's a favorite among users who want something more capable than basic viewers but don't want to pay for Adobe Acrobat. The rendering quality is excellent, and the OCR engine handles scanned documents reasonably well. If you work with PDFs on Windows regularly, it's worth trying the free version to see if it covers your needs. The paid upgrade is a one-tim