MBOX Viewer
Browse an MBOX mailbox — Gmail Takeout, Thunderbird, Apple Mail — and search every message. Private.
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Runs entirely in your browser — nothing is uploaded
How to use the MBOX Viewer
- 1
Open your MBOX file
Click the box or drag the file onto it. It’s read by your browser — nothing is uploaded.
- 2
Read it instantly
The content appears on the page in a second or two, even for large files.
- 3
Convert if you need to
Use the related converters below to turn the file into PDF, CSV or another format.
Search and read a whole mailbox export without importing it into an email app. Messages are listed with sender, subject and date; click one to read it and download its attachments. The message count is shown too.
Read the full guide with screenshotsFrequently asked questions
Is the MBOX Viewer free?
Yes — completely free with no daily limit and no account. ZapMorph’s viewers and developer tools are unmetered.
Is my file uploaded to a server?
No. The file is opened by your browser and displayed on this page. It is never uploaded, stored or logged — close the tab and it’s gone.
Does it work on my phone?
Yes. It works in any modern browser on iPhone, Android, Windows, Mac and Linux, with nothing to install.
How large can the file be?
There is no fixed limit — it depends on your device’s memory. Files of a few hundred megabytes open fine on most computers.
Related converters
MBOX to PDF
MBOXPDF
Convert MBOX mailboxes to PDF with sender, recipients, date and message body. Private — nothing is uploaded.
MBOX to EML
MBOXEML
Convert MBOX mailboxes to standard EML files that open in Thunderbird, Apple Mail and Outlook.
MBOX to CSV
MBOXCSV
Export MBOX mailboxes to a CSV spreadsheet — one row per email with date, sender, subject and body.
MBOX to HTML
MBOXHTML
Convert MBOX mailboxes to HTML pages that open in any browser, with headers and formatting kept.
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Open Outlook PST files without Outlook: browse folders, search and read emails, and save attachments. Private.
Excel Viewer
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