how-to-verify-checksum

Security
  1. 1

    Get the expected checksum

    Find the official SHA-256 hash for the file from a trusted source. For 7-Zip itself, check the official GitHub releases page.

  2. 2

    Calculate the file hash

    Right-click the downloaded file in Windows Explorer, select "7-Zip" > "SHA-256" (or CRC SHA > SHA-256 in older versions).

  3. 3

    Compare the hashes

    7-Zip calculates and displays the SHA-256 hash. Compare it character-by-character with the expected hash from the official source.

  4. 4

    Verify match

    If the hashes match exactly, the file is authentic and uncorrupted. If they differ, the file may be corrupted or tampered with — delete it and re-download from the official source.

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