Total Validator Test v18.1.0
This test version will tell you if you have any issues, but you must buy the Basic or Pro versions to see where the issues are in order to fix them.
Total Validator Test runs on Windows, macOS, and Linux. See supported platforms for details.
It is free to use, but please read the licence before downloading.
Installing, Documentation, FAQ, Change log
Checksums:
Windows,
macOS (Apple),
macOS (Intel),
Linux
How to use checksums