Windows and Office Genuine ISO Verifier
Checks whether a Windows or Office ISO is genuine
Description
You download a multi-gigabyte Windows image from a forum or a file host labeled "official untouched" — but has anything been added to it? Finding out after the install is too late. The proper check is comparing the file's SHA-1 against Microsoft's published value, which means digging up that value and finding a tool to hash with. This program collapses both steps: point it at an ISO and it hashes the file and compares against a built-in database of official checksums, marking a match as GENUINE (MSDN) and showing the corresponding official filename.
The bundled database covers MSDN and VLSC release images across Windows and Office generations, so Microsoft's publication pages do not need hunting down. Files can be checked one at a time or added to a list for batch verification, with both SHA-1 and SHA-256 supported and the matched official name and hashes shown in the results — a match means the release image, a mismatch means this file is not what Microsoft shipped.
Worth being clear about what it does not do: it verifies that an image matches an official release. It has nothing to do with activation and does not modify the image. Portable and free.
Compares against official checksums: a built-in hash database of MSDN and VLSC Windows and Office images is matched automatically after hashing, flagging a hit as GENUINE with the official filename.
Single and batch modes: verify one ISO or add several to a list and check them in one pass, with pass or fail listed per row.
SHA-1 and SHA-256: either algorithm can be computed and compared, with the hash values displayed so you can cross-check them yourself.
Progress reporting: percentage complete and remaining time are shown while hashing, which matters on multi-gigabyte files.
Clear results: a match reports the exact official release filename, such as en-us_windows_11_consumer_editions_..., identifying precisely which image you have.
No activation involvement: the tool only checks integrity and provenance — nothing to do with activation or bypasses — and never alters the file it inspects.
Portable: unpack and run, with nothing written to the registry.
Regularly updated: the author ships monthly builds, refreshing the checksum database as new images are released.
Free: free to use.
The bundled database covers MSDN and VLSC release images across Windows and Office generations, so Microsoft's publication pages do not need hunting down. Files can be checked one at a time or added to a list for batch verification, with both SHA-1 and SHA-256 supported and the matched official name and hashes shown in the results — a match means the release image, a mismatch means this file is not what Microsoft shipped.
Worth being clear about what it does not do: it verifies that an image matches an official release. It has nothing to do with activation and does not modify the image. Portable and free.
Features
Compares against official checksums: a built-in hash database of MSDN and VLSC Windows and Office images is matched automatically after hashing, flagging a hit as GENUINE with the official filename.
Single and batch modes: verify one ISO or add several to a list and check them in one pass, with pass or fail listed per row.
SHA-1 and SHA-256: either algorithm can be computed and compared, with the hash values displayed so you can cross-check them yourself.
Progress reporting: percentage complete and remaining time are shown while hashing, which matters on multi-gigabyte files.
Clear results: a match reports the exact official release filename, such as en-us_windows_11_consumer_editions_..., identifying precisely which image you have.
No activation involvement: the tool only checks integrity and provenance — nothing to do with activation or bypasses — and never alters the file it inspects.
Portable: unpack and run, with nothing written to the registry.
Regularly updated: the author ships monthly builds, refreshing the checksum database as new images are released.
Free: free to use.
