🔍 Find Your Converter
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Convert emails, calendars and contacts to CSV, Excel, PDF and more. Migrate data between platforms, create reports, backup your information, all with our 100% free conversion tools.
Tell us what you have and what you need, we'll recommend the right tool.
Transform email files for migration, backup and analysis
Convert Outlook PST data files to multiple formats. Extract emails, contacts, calendars and attachments.
Convert Outlook Offline Data files (OST) when server is unavailable. Recover and export cached mailbox data.
Convert MBOX email archives from Thunderbird, Apple Mail, Gmail takeout and other clients.
Convert standard EML email message files. Batch process individual emails from any email client.
Convert Outlook MSG message files. Perfect for saved emails, drag-dropped messages and email archives.
Export calendar events for reporting and migration
Convert iCalendar (.ics) files from Google Calendar, Outlook, Apple Calendar to spreadsheet and document formats.
Export contacts for CRM import, mailing lists and migration
Convert vCard (.vcf) contact files from phones, email clients and address books to spreadsheet formats.
Univik File Converters are free Windows applications that transform proprietary file formats into universally accessible formats like CSV, Excel, PDF, HTML and JSON. They enable data extraction, migration, reporting and backup.
Email Converters: PST Converter (Outlook data files), OST Converter (offline Outlook files), MBOX Converter (Thunderbird, Gmail, Apple Mail archives), EML Converter (standard email messages), MSG Converter (Outlook messages). All extract emails, attachments, contacts and calendars to spreadsheet and document formats.
Calendar Converter: ICS Converter transforms iCalendar files from Google Calendar, Outlook, Apple Calendar into CSV, Excel, PDF. Extracts events, attendees, recurring patterns and timezones. Perfect for meeting reports and calendar migration.
Contact Converter: VCF Converter exports vCard contacts to CSV, Excel for CRM import, mailing lists and contact migration between platforms.
Key capabilities: Batch processing (convert hundreds of files at once), custom field selection, date filtering, format-specific optimizations, complete offline operation for privacy.
Common uses: Email platform migration (Gmail to Outlook), creating reports from mailbox data, calendar backup and analysis, contact list export for marketing, legal discovery and e-discovery, compliance archiving.
Format Support
See all supported input → output combinations at a glance.
| Source | CSV | Excel | HTML | JSON | EML/MSG | |
|---|---|---|---|---|---|---|
| 📧 PST | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 📧 OST | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 📧 MBOX | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 📧 EML | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 📧 MSG | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| 📅 ICS | ✓ | ✓ | ✓ | ✓ | ✓ | — |
| 👤 VCF | ✓ | ✓ | ✓ | ✓ | ✓ | — |
Note: All converters also support XML output. Email converters additionally support PST output for consolidation.
Real-World Applications
See how organizations and individuals use our converters.
Moving from one email/calendar platform to another? Convert your data to a universal format first, then import cleanly into the new system.
Need to analyze communication patterns, meeting frequency or contact data? Convert to spreadsheet format for sorting, filtering and charting.
Create permanent, searchable archives of your emails, calendars and contacts that don't depend on any specific application.
Extract and document email communications for legal proceedings, audits and compliance requirements.
Maintain control over organizational data by converting proprietary formats to open, accessible formats.
Feed data into CRM, ERP, project management or other business systems that can't directly read email/calendar files.
Simple Process
Same simple workflow for all converters.
Select the converter that matches your source file type. Have PST files? Use PST Converter. Have ICS files? Use ICS Converter. Each tool is optimized for its specific format.
Download the free converter (no registration required). Installation takes under a minute. Works on Windows 7, 8, 10 and 11, both 32-bit and 64-bit.
Add individual files, select multiple files or load entire folders. All converters support batch processing, convert hundreds of files in one operation.
Choose your output format (CSV, Excel, PDF, etc.). Select which fields to include. Set date format, timezone preferences and any format-specific options.
Click Convert to transform your files. The output is immediately ready for use, open in Excel, import to another system, share with colleagues or archive for records.
Common Questions
Univik File Converters support three categories of files:
All can be converted to CSV, Excel (XLSX), PDF, HTML and JSON formats.
Yes, completely free with no catch. Univik File Converters are:
We offer these tools free as part of our commitment to accessible data conversion.
To migrate from Gmail to Outlook:
This gives you a clean migration with all emails, folders and attachments preserved.
Yes! All Univik Converters support batch processing:
There's no limit to the number of files you can process in a batch.
Absolutely. All Univik Converters process files entirely on your local computer:
This makes our converters ideal for sensitive data like legal emails, financial records and personal communications.
CSV (Comma Separated Values):
Excel (XLSX):
Email converters handle attachments based on your output format:
You can always choose to extract attachments to a separate folder during conversion.
Yes! Univik Converters are designed to handle large files:
For very large files (50GB+), we recommend having sufficient disk space for the output and allowing adequate time for processing.
Choose based on your source file:
Use our Converter Finder above to get a recommendation based on your needs.
All Univik Converters support:
Requires .NET Framework 4.5 or higher (pre-installed on Windows 8+).
Currently, Univik Converters are Windows-only applications. However, you can use them on Mac or Linux through:
File Viewers:
File Converters:
Need to just look at a file? Use a Viewer. Need to export the data? Use a Converter.
Every Converter Includes
Powerful capabilities built into every conversion tool.
Convert hundreds or thousands of files in a single operation. Add individual files, multiple selections or entire folders.
Choose exactly which fields to include in your output. Include only what you need, dates, subjects, senders or any combination.
Export only data within a specific date range. Extract last month's emails, this quarter's meetings or any custom period.
All conversion happens locally on your computer. No data is uploaded to any server. Complete privacy for sensitive files.
Export to CSV, Excel, PDF, HTML, JSON, XML and more. Choose the format that works best for your workflow.
Save your preferred settings, field selections, date formats, output options and reuse them for future conversions.
Choose your converter and transform your data in minutes.
All tools: Free | No registration | No file limits | 100% offline
Converter Tools
Output Formats
Files Converted
User Rating
Preview files without converting, check our File Viewers.
Preview PST, MBOX, EML, MSG, ICS, VCF files without any conversion. Read-only, safe viewing.
Browse Viewers →Learn about different file formats, what they are, how to open them and which tools to use.
Browse Extensions →Guides, tutorials and documentation for all our conversion and viewing tools.
Browse Help →Need Help With File Conversion?
Our support team is here to help with format selection, migration workflows, batch processing or any other conversion questions.