Winmail.dat extractor

Extract attachments from your winmail.dat, ATT00001.dat and TNEF files with this free tool.

No registration or email required. Extraction runs locally in your browser, so your data is 100% private and secure. Your file is never uploaded anywhere.

Click or drop your file here

What is winmail.dat?

Microsoft Outlook can be configured to send email content as a file called "winmail.dat" or "ATT0001.dat". This file uses the TNEF format to make sure that recipients who are also using Outlook see all of the original data and features. If the recipient is not using Outlook, this file appears as an attachment instead of as an email. Our free tool lets you extract the contents from this file.