Free MBOX viewer with search
A three-pane explorer for any MBOX file, with full-text search that answers in about 0.3 seconds across 500,000 messages.
SetuFlow MBOX Converter
Open and convert MBOX from Gmail, Thunderbird and Apple Mail
Google Takeout gives you one enormous MBOX file; Thunderbird and Apple Mail keep mail the same way. SetuFlow MBOX Converter opens them on Windows, lets you search half a million messages in a third of a second, and converts them to EML, MSG, PDF, Word and more.
- Windows 10 & 11
- Free edition — 25 items per job
- Works offline
- Source never modified
Every format it converts to
Only formats that have passed our validation tests are listed. More are added as they pass.
Mailbox
EMLMSGMBOXEMLXMaildirThunderbirdWindows Live MailZimbra TGZ
Documents
PDFDOCXHTMLMHTRTFTXTXPS
Data
CSVAttachments only
Built for the job, not the demo
Duplicate removal
Google Takeout repeats a message in every label it carries. Three duplicate-detection modes make sure each email is converted once.
Filter before you convert
Date, sender, recipient, subject, size, attachments and attachment type — convert just the year or the client you need.
Folders and names kept
Thunderbird folders and .sbd sub-folders are recreated in the output, with seven file-naming patterns to choose from.
Robust on messy files
Handles every MBOX variant, flags malformed messages instead of stopping, retries failures and resumes without duplicates.
Item and error logs
Every job writes a list of converted items and any errors, so you can account for every message.
What people use MBOX Converter for
Google Takeout (Gmail) MBOX to PDF or EML
Download your Gmail with Google Takeout, then open the .mbox file here to read it offline, convert it to PDF for records or to EML to import elsewhere — duplicates from Gmail labels removed.
Thunderbird to EML and MSG
Point the converter at your Thunderbird profile folder; every mailbox and sub-folder converts to EML or Outlook MSG files with the structure intact.
MBOX to PDF and Word
Turn a whole mailbox, or a filtered slice of it, into PDF or DOCX documents, with attachments saved alongside.
MBOX to Zimbra and Windows Live Mail
Produce a Zimbra TGZ for import into a Zimbra server, or Windows Live Mail folders, from any MBOX source.
Three steps
- 1
Add MBOX files or a profile folder
Takeout files, Thunderbird profiles and Apple Mail bundles all work.
- 2
Search, filter, de-duplicate
Preview what you are about to convert.
- 3
Convert
Resume any time; check the item and error logs.
Benchmarks
75 s
To open 500,000 messages (2.4 GB)
305 ms
Full-text search over 500,000 messages
1,900/s
MBOX to EML
0
Failures in 2.1 million exported items
Measured on an Intel Core Ultra 9 285K, 32 GB RAM and an NVMe SSD using a 500,000-message test mailbox. Your speed depends on your hardware.
Start free. Pay once you need more.
Try every feature on your own files with the Free edition. Prices in US dollars, per licence, before any applicable tax.
Free
Open, read and try every feature on real files.
Free
- Viewer with no limit
- Convert up to 25 items per job
- Every output format except MSG
- Filters, previews and job reports
Most popular
Professional
For one person converting their own mail.
$20.30
- No message limit
- MSG export
- Batch jobs and advanced filters
- Attachment extraction
Business
For IT teams and migration projects.
Quote
- Everything in Professional
- Upload straight to an IMAP mail server
- Advanced job reports for audit
- More parallel workers for large jobs
- HTML integrity report per job
System requirements
- Operating system
- Windows 10 (1809 or later) or Windows 11 — 64-bit and 32-bit editions
- Microsoft Outlook
- Not required — the converter reads the file itself
- Other software
- None — the installer includes the runtime
- Previews
- Microsoft Edge WebView2 for rich HTML preview
- Command line
- Open files and run jobs from the command line
MBOX Converter, answered
What people want to know before they buy. Anything else — the assistant or a human will answer it.
Add the .mbox file from your Takeout download to SetuFlow MBOX Converter. It opens in the free viewer with full-text search, and you can convert any part of it to EML, PDF, MSG and other formats.
Gmail labels are not folders, so Takeout writes a message once for each label. Turn on duplicate detection and each message is converted only once.
Yes — Thunderbird's extension-less mailbox files and their .sbd sub-folders are recognised, and the folder tree is recreated in the output.
Not on this page yet. PST output is in testing and will be listed here once validated. To move MBOX mail into Outlook today, convert to MSG files.
The Free edition is free forever, with a limit of 25 items per conversion job. Professional removes the limit. Your licence key is checked offline on your own PC, so the converter keeps working without an internet connection and nothing about your mail is ever sent to us.
No. The converter is desktop software: it reads the file on your disk and writes the result to a folder you choose. Your source file is opened read-only and never changed. The only time data leaves the PC is if you choose to upload to your own mail server in the Business edition.
More SetuFlow data tools
Try MBOX Converter free on your own files
Download the Free edition, open your files and convert 25 items per job. Upgrade when you are sure it does what you need.
Professional licence $20.30 · Windows 10 and 11 · No Outlook required