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Ensuring files have not been tempered with is an essential task in today's highly connected and exposed world. While this can be performed by simply password-protecting documents, an alternative method is computing hash or checksum values. HashZilla allows users to perform just such tasks, with options for both SHA1 and SHA2 cryptographic hashes, but also for commonly used checksum functions.

Specifically, the application supports SHA1, SHA224, SHA256, SHA384, SHA512 and MD5 hashes algorithms, but also computing Cyclic Redundancy Checks (CRC32) and ADLER32 checksums. These methods can be employed to test whether a file transferred from an external party has been tempered with structurally.

One of the great features of this application is that it can perform these analyses with either multiple protocols or just single ones. For example, one can opt to employ only SHA2 protocols for a document, or only CRC32 and ADLER32 checksum algorithms.

Another notable feature is the program's ability to process any file, of any extension or size. This being said, it is obvious that larger items will take considerable time to process; generally-speaking computing any hash or checksum for an item larger than 500 MB can take longer than a minute, although this depends on the settings chosen.

Regardless, users should refrain from abruptly closing the program, even if it turns unresponsive. If however, the process needs to be terminated quickly, one can employ the “Cancel” function; for skipping individual steps, a “Skip” button can be used.

To conclude, HashZilla is a powerful and lightweight application that will be valuable for anyone interested in checking the integrity of files transferred over the Internet.