Open a PST file without Outlook
Drop an Outlook .pst or .ost archive and read, search, and export it on this page — on a Mac, a PC, or a Chromebook. No Outlook, no Exchange connection. The file is parsed on your own machine and never leaves your device.
Drop the .pst or .ost file — it is read locally, with nothing uploaded.
Browse the folder tree and open any message with its attachments.
Search across every folder by subject, sender, or body text.
Export one message free — or batch-export whole folders and search results to MBOX / EML with Pro.
Open a PST file without Outlook
Use this viewer when you need to open a PST archive on a machine that never had Outlook — a Mac, a Chromebook, or a fresh laptop after someone leaves. Mailward reads the PST format directly in a Web Worker, streaming the file in pages so multi-gigabyte archives open without exhausting memory.
Reading, folder browsing, full-text search, and single-message export are always free; batch conversion is the paid step. No file ever touches a server.
On a Mac? macOS has no readpst and new Outlook for Mac won't export mail files. A browser tool is the one path that doesn't need a Windows machine.
Before you trust a mail file to a website
Q. Does my email really stay private?
Yes. The archive is read with the browser's File API and parsed in a Web Worker on your own machine. No part of it is sent to a server — you can disconnect from the network after the page loads and keep working.
Q. Do I need Outlook installed?
No. Mailward reads the PST format directly, so you can open an archive on a Mac, a Chromebook, or any machine that never ran Outlook.
Q. My PST is several gigabytes. Will it crash?
No. Mailward streams the file in pages instead of loading it whole, so multi-GB archives open without exhausting browser memory — the exact case where browser-based viewers usually fail.
Q. What if the file is corrupted?
A viewer cannot repair a damaged PST. If Windows' own scanpst cannot open it, neither can Mailward. We read healthy archives and tell you plainly when a file is beyond reading.
Simple, one-time pricing
Opening, reading, searching, and single-message export are free forever. Batch conversion is a one-time unlock — no subscription, no recurring fees.
Everything you need to open and read an archive.
- Open & read PST, OST, MBOX, EML — locally
- Full-text search across every folder
- Export a single message
- Files never leave your device
Unlock batch conversion for good — a single payment, yours to keep.
- Batch-convert whole folders to MBOX or EML
- Export all search results as .eml files in one click
- Extract every attachment to a ZIP
- Lifetime license — no renewals
Other formats & archives
Same local-first engine, every common mail format.