What is Mailward?
Mailward is a local-first email archive viewer that opens PST and OST files right in your browser. It works on Mac, Windows, Linux, and ChromeOS, so you can read old Outlook archives without installing Outlook or connecting to Exchange. The app lets you browse folder trees, search across subjects, senders, and body text, and open messages with attachments. It also supports other mail formats like OLM, MBOX, EML, and MSG. Files are parsed on your own device, so nothing is uploaded to a server. Basic viewing and single-message export are free, while paid Pro features add batch conversion, full archive export, and bulk attachment extraction.
Key features
- Reads PST and OST files locally in your browser.
- Searches messages by subject, sender, and body text.
- Browses folder trees and opens attachments easily.
- Streams multi-gigabyte archives without loading them fully.
- Exports single messages free, with batch export in Pro.
- Supports PST, OST, OLM, MBOX, EML, and MSG.
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