Open MBOX Mailboxes Instantly.
Open and read .mbox mailbox files on iPhone, iPad, and Mac — fully offline. Read every email, attachment, and header with no Thunderbird and no import step. Just open the file.
Powered by the Rush Tools Engine™
MBOX Viewer parses .mbox files entirely on your device. No cloud uploads, no server processing, no telemetry — forensic-grade privacy by design.
Open Instantly
Open .mbox archives of any size and start reading right away.
Every Email & Attachment
Read messages, open attachments, and check headers — all in one place.
Fully Offline & Private
Your mailbox stays on your device — no uploads, no account, no tracking.
No Mail Client Needed
No Thunderbird, no import. The Rush Tools Engine™ opens the file directly.
See it on every device.




About MBOX files.
What is an MBOX file?
MBOX is a common mailbox format that stores many emails in a single file. It's exported by tools like Thunderbird, Apple Mail, and Google Takeout.
Do I need Thunderbird or a mail app?
No. MBOX Viewer opens the file on its own — no other software required.
Is my mail private?
Yes. Everything is read locally on your device; nothing is uploaded.
Can it open large mailboxes?
Yes — even very large .mbox archives open smoothly.
Get MBOX Viewer today.
Open .mbox files in seconds — strictly offline, strictly private.