GainTools PST to MBOX Converter

gaintools-pst-to-mbox-converter

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Sachin Kumar· 2mo ago
I had an old PST backup from Outlook that I needed to open in Thunderbird, but Thunderbird uses MBOX files. I didn't want to install Outlook again just for the conversion, so I looked for another option and found this converter through a forum discussion. The conversion was straightforward, and I was able to move the emails without having to deal with the manual process. Overall, it worked well for what I needed.
joseph· 3mo ago
I was facing difficulty while moving my Outlook emails because my PST files were not working with the email application I wanted to use. I needed a way to change the format without losing my data. I tried GainTools PST to MBOX Converter and followed the simple steps. I selected my PST file, checked the mailbox details, chose the output location, and started the conversion. The tool completed the process smoothly, and I was able to access my emails in MBOX format easily.

GainTools PST to MBOX Converter offers an advanced solution to convert Outlook emails to MBOX-compatible email clients, such as Mozilla Thunderbird, Apple Mail, Eudora, Entourage, and others. Preserving email formatting, attachments, and metadata, the utility converts PST files, both ANSI and Unicode, into MBOX file format. This user-friendly solution allows bulk file export, thereby simplifying migration and reducing the need for Microsoft Outlook for conversion. Main Qualities: Create MBOX from Outlook PST files. Keeps folder organization and email style. This tool facilitates the conversion of multiple PST files in a batch. There is no Outlook installation needed. It is compatible with all MBOX email clients, including Thunderbird and Apple Mail. Run on all major Windows versions. Access a free trial version here. System prerequisites: OS: Windows 11, 10, 8.1, 8, 7 (32- and 64-bit) RAM: 512MB (1GB recommended) Processor: 1 GHz or above. Hard drive: 100MB available free space. Easy Guide for Using GainTools PST to MBOX Converter Download and install the GainTools PST to MBOX converter tool. Click "Browse" to choose the PST file you wish to convert. Before conversion, view folders and send items. Your target format should be MBOX. Where should the converted MBOX files be stored? Start the process by clicking on "Convert Now."

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GainTools PST to MBOX Converter converts Outlook PST files to MBOX format for email clients like Thunderbird and Apple Mail.

for: IT admins and users needing to migrate Outlook emails to MBOX-compatible clients.
pricing: paid · free trial

Key features

6 features of GainTools PST to MBOX Converter

Batch conversion — Convert multiple PST files to MBOX in one operation without Outlook installed.
Folder hierarchy preservation — Keeps original folder structure, metadata, and attachments intact.
Selective folder export — Extract specific folders (Inbox, Contacts, Calendar, etc.) from a PST.
Preview before conversion — View PST contents, folder counts and email details prior to export.
Custom output location — Choose any folder for the resulting MBOX files.
Supports ANSI & Unicode PST — Handles both older and newer Outlook PST formats.

Use cases

Migrate a corporate Outlook archive to Thunderbird for long-term storage
Export personal Outlook PST to Apple Mail after switching Macs
Extract only the Calendar folder from a PST for import into another calendar app
Create MBOX backups of legal email records while preserving metadata

GainTools PST to MBOX Converter vs alternatives

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	GainTools PST to MBOX Converter	GainTools MBOX Converter	GainTools PST to MSG Converter	WholeClear PST to EML Converter	GainTools PST Converter
Best for	Batch PST-to-MBOX conversion on Windows	MBOX-to-other format conversion	PST-to-MSG conversion	PST-to-EML conversion	General PST conversion
Pricing	Paid	One time fee	One time fee	One time fee	One time fee
DevHunt upvotes	0	0	0	0	0
Launched	Jan 2026	Jan 2026	Jan 2026	Jan 2026	Jan 2026