Kernel for PDF Repair is described as 'Kernel for PDF repair is highly advanced pdf file recovery software integrated with an extremely user-friendly Graphical user interface. The software provides instant and effortless recovery of data from the PDF file that seemed inaccessible or corrupt' and is an app in the Security & Privacy category. There are three alternatives to Kernel for PDF Repair for Windows and Mac. The best alternative is Stellar Repair for PDF. It's not free, so if you're looking for a free alternative, you could try PDF Fixer or Corrupt PDF Viewer.
Stellar Repair for PDF It is an effective Windows-based PDF repair software that can repair damaged PDF files. It restores forms, headers, footers, word art, clip art, page format, shapes, charts, and tables enclosed in the PDF files.
PDF Fixer is a free PDF repair utility which fixes corrupt PDF files by restructuring the damaged PDF data, rebuilding XREF tables and then recovers those PDF documents back. It can repair PDFs which PDFTK & Ghostscript cannot repair.
Corrupt PDF Viewer is a free small utility that enables users to open and view damaged PDF files on Windows instantly. Unlike other PDF repair tools only fix and recover damaged PDFs, it can open and display corrupt PDF content directly.