https://prismmigration.com Enterprise Mailbox & Database Migration Software Utilities PRM-CON-2026-002 MBOX Converter Tool (2026 Enterprise Edition) # Prism MBOX Converter Tool — Windows & macOS (v26.08, 2026 Enterprise Edition) When you pull a 45GB Google Takeout archive or inherit ten years of Mozilla Thunderbird mailboxes, you quickly discover that Microsoft Outlook has zero native support for Unix MBOX files. Double-clicking the file does nothing. Dragging it into Outlook fails silently. And basic freeware tools usually choke with an `OutOfMemoryException` halfway through the second gigabyte. We built Prism MBOX Converter to solve this exact problem cleanly, reliably, and 100% offline. --- ## Why Standard Tools Fail on Modern MBOX Files MBOX is not a single standardized format. Over the last thirty years, different email clients have implemented completely different variations of RFC 4155: 1. **Mozilla Thunderbird Nested Directory Trees (`.sbd`):** Thunderbird stores folder hierarchies as extensionless MBOX files coupled with `.sbd` directory structures and `.msf` index caches. Generic converters grab the top-level `I https://prismmigration.com/products/mbox-converter-tool https://prismmigration.com/screenshots/mboxc-1.png in_stock 49.00 USD Prism Migration new PRM-PST-CONV-2026 PST Converter Tool # PST Converter Tool — Windows & Mac (v26.08, 2026 Edition) When you open a PST file and realize it holds 80,000 emails, 4 years of calendar events, and a full contacts book — and your target is Google Workspace — you need a tool that handles the whole job, not just the emails. That is what we built. ## What It Actually Does The Prism PST Converter reads Outlook PST files directly off disk. No MAPI. No Exchange. No Outlook install. It parses the binary format natively using a 64-bit engine, then pushes the output to wherever you need it — a local folder, a cloud inbox, or an enterprise tenant. **17 output targets supported:** PDF · HTML · MHTML · RTF · DOC · TXT · JSON · CSV · EML · MSG · MBOX · EMLX · PST Archive · Gmail · Google Workspace · Office 365 · IMAP Server · Yahoo Mail Output is not just emails. We also migrate **Contacts, Calendar events, and Tasks** directly to Gmail and Office 365. Most converter tools skip this. We do not. ## Enterprise & Admin-Level Migra https://prismmigration.com/products/pst-converter-tool https://prismmigration.com/og-default.png in_stock 49.00 USD Prism Migration new