How to Repair Corrupt NSF file for Free?

I have corrupt NSF File when I try to open it says the file cannot be opened or corrupt. I tried the nfixup tool but it does not work out. I scan the files and then the nFixup tool also shows which files are corrupt but it is unable to repair them. Is there any other method by which the corrupt NSF files in Lotus Notes could be resolved. You could also suggest any third party Lotus Notes Repair tool that is reliable enough to recover and repair corrupt lotus notes file. I found the manual method to fix NSF files at https://www.filerepairtools.com/tips/how-to-repair-corrupt-nsf-files-in-lotus-notes-with-fixup-tool/