It integrates directly into the Windows Shell (right-click menu), making it incredibly easy to "Add to archive" or "Extract" without opening a separate program. 2. PeaZip: Best for Conversion
7-Zip is widely considered the best free option for Windows 7. It is lightweight, completely open-source, and specifically offers a dedicated version. It integrates directly into the Windows Shell (right-click
If you need to specifically one archive type to another (e.g., RAR to ZIP), PeaZip is the superior choice. It acts as a bridge between many different compression technologies. RAR to ZIP)