Free online OST to CSV converter
How to convert OST files to CSV format for easy data extraction and analysis using Outlook or third-party tools.
Convert OST to CSV online - free
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Import a file from a URL
Paste a direct link to the file. We download it to our server and it is converted exactly like an upload.
How it works
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Upload your .ost file
Click to browse to select your file you want to convert or simply drag & drop your file into selected area.
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Perform .ost to .csv conversion
After successful file upload, click to convert when you are ready.
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Download converted .csv file
Conversion result is ready to download.
How to convert ost to csv file
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Understanding ost and csv file formats
OST (Offline Storage Table) files are used by Microsoft Outlook to store mailbox data such as emails, contacts, calendar events, and more for offline access. These files are typically created when Outlook is used with Microsoft Exchange Server or Outlook.com accounts. CSV (Comma-Separated Values) files are plain text files that store tabular data, such as spreadsheets or databases, in a simple, widely supported format. Each line in a CSV file represents a row, and columns are separated by commas.
Why convert ost to csv?
Converting an OST file to CSV format is useful when you need to extract mailbox data for use in spreadsheet applications like Microsoft Excel, Google Sheets, or for importing into other databases and applications. CSV files are easy to manipulate, analyze, and share.
How to convert ost to csv
Direct conversion from OST to CSV is not natively supported by Outlook. You need to first extract the data from the OST file, usually by converting it to PST (Personal Storage Table), and then export the required data to CSV. Here’s how you can do it:
- Open OST file in Outlook: Ensure your OST file is accessible in Microsoft Outlook.
- Export to CSV: In Outlook, go to File → Open & Export → Import/Export.
- Select Export to a file and click Next.
- Choose Comma Separated Values and click Next.
- Select the folder (such as Inbox or Contacts) you want to export.
- Choose the destination and filename for your CSV file.
- Click Finish to complete the export.
Best software for ost to csv conversion
For more advanced or bulk conversions, or if you cannot access the OST file in Outlook, consider using dedicated third-party tools. Some of the best options include:
- Stellar Converter for OST: Allows you to convert OST files directly to CSV, PST, and other formats.
- KDETools OST to PST Converter: Supports exporting OST data to CSV, EML, MSG, and more.
- SysTools OST Recovery: Recovers and exports OST data to CSV and other formats.
These tools are user-friendly and support batch conversion, making them ideal for large or corrupted OST files.
Summary
Converting OST files to CSV format enables easy data analysis and sharing. While Outlook provides a built-in export feature, third-party tools offer more flexibility and advanced options for handling inaccessible or large OST files.
Note: This ost to csv conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.
Information about file extensions and file types is provided by File-Extensions.org
Suggested software and links: ost to csv converters
Frequently asked questions
Is the OST to CSV converter free?
Yes, converting OST to CSV on 101convert.com is completely free. No registration, email address or installation is required. If you need a higher file size limit or want to convert more files at once, see our plans.
How large can my OST file be?
You can upload OST files up to 30 MB and convert up to 3 files at once in a single batch. With a paid plan the limit is up to 2000 MB per file and 5 files at once, see our plans.
What happens to my uploaded files?
Files are processed automatically and deleted from our servers within a few minutes after conversion. We never view or share your files.
Do I need to install any software to convert OST to CSV?
No. The OST to CSV conversion runs entirely online in your browser and works on Windows, Mac, Linux, Android and iPhone.
Did the conversion fail?
In most cases, the cause is an incorrect file format. Please upload a valid OST file for this OST to CSV conversion. Occasionally, the issue may be on our side. We analyze recurring conversion failures and disable or fix the converter if we detect a defect.