PST Viewer

View and export Outlook PST/OST files locally in your browser

PST Viewer lets you open and explore Microsoft Outlook PST and OST email archive files directly in Chrome — no Outlook required, no uploads, no server. Everything runs 100% locally on your device. Your emails never leave your computer. FEATURES • Open any .pst or .ost file via file picker or drag & drop • Browse the full folder tree with message counts • View emails with full HTML rendering • Inspect raw MAPI message headers and properties • View and save email attachments • Export individual emails or entire folders as .eml files • Sort messages by From, Subject, or Date • Opens as a full-screen app window — no browser chrome PRIVACY No data is ever collected, transmitted, or stored. The extension has no network functionality and works entirely offline after installation. SUPPORTED FORMATS Unicode PST files (Outlook 2003 and later). OST files (Outlook 2010 and later). ANSI-format PST files (pre-Outlook 2003) are not currently supported.