Free PST Viewer Comparison Find the Right Tool for Your PST Files

PST files accumulate. Employees leave and their mailboxes get exported to PST archives. Office 365 migrations produce backup PSTs that sit on file servers for years. Outlook licenses expire or get reassigned. Then litigation hits, a compliance audit surfaces or HR needs to review a former employee's email. The PST files are there but no one has the software to open them.

Microsoft Outlook can open PST files but it requires an active license. For organizations managing dozens or hundreds of archived PST files across departed employees, buying Outlook licenses just to read old email is wasteful. For forensic examiners and lawyers, Outlook is the wrong tool entirely because it modifies metadata on access and provides no chain of custody documentation.

Free PST viewers solve this problem. But "free" means different things to different vendors. Some offer free preview with content paywalled behind a purchase. Others limit search or restrict how many emails you can view. The comparison below documents exactly what each tool provides at no cost and what requires payment.

Most PST viewer vendors use "free" as a marketing hook. You download the tool, open your PST file and see a folder tree with message subjects. Then you click a message to read the body and hit a paywall. The free version was never meant to be usable. It exists to capture your email address and push you toward a purchase.

Sherlock Forensics PST Viewer Free Edition works differently. You get full read access to every email, contact and calendar item in the PST file. You can search across the entire archive by sender, subject or keyword. You can verify SHA-256 hashes to confirm file integrity. There is no preview limit, no watermark on content, no trial expiry and no feature countdown. The free edition is a complete viewing tool.

We built it this way because our core business is forensic investigation and expert witness testimony. The free PST viewer gets the tool into the hands of IT administrators, lawyers and compliance officers who may later need forensic-grade capabilities. When they do, the Forensic Edition is $67. Not $299.

The free edition handles viewing, searching and hash verification. The Forensic Edition at $67 USD adds the capabilities that forensic examiners, litigators and compliance teams require when email evidence must be documented, exported or presented in court.