Kernel OLM Viewer is an easy-to-use tool that can view OLM files without having Mac Outlook installed, and meanwhile supports repairing corrupt OLM files. The process only requires three simple steps. You can add multiple files at a time.
It supports viewing all the items of an OLM file, and allows you to find the specific items you are looking for by the Find option with criteria like To, From, Date, Attachments, Subject, Received before/after. For any accidentally or deliberately deleted items, Kernel OLM Viewer can get them recovered.