Clicking Test verifies the integrity of the archive and reports any CRC or data errors without writing files to disk.

The command line provides the most detailed technical look into a .7z file.

This is the most "informative" mode, displaying detailed properties for every file and the archive itself, such as the specific compression method (e.g., LZMA2), solid block status, and hash checksums. 7z l archive.7z -slt

You can right-click files within the manager to calculate SHA-256 or CRC hashes to verify they match original sources. 3. Specialized Plugins & Tools How to recover corrupted 7z archive