Extract text from IncrediMail header files (IMH)
To convert IMH header files to another format, you need IncrediMail or other Data software.
To convert other file formats to the "Email Header File" file type, you need software like IncrediMail or a similar tool.
The .IMH file is a proprietary email header file created by IncrediMail, an email client that was officially discontinued in 2020. This file stores metadata for an email message, such as the sender, recipient, date, and subject line. It does not contain the actual email body or attachments. IncrediMail utilized a split-storage architecture where the .IMH file was paired with a corresponding IMM file, which held the actual message content.
Users frequently need to convert .IMH files because IncrediMail is dead software. The format is entirely proprietary, meaning modern email clients like Microsoft Outlook or Mozilla Thunderbird cannot open it natively. A major disadvantage of this format is its split design. Since the .IMH file only contains headers, converting it alone will not restore your full emails.
The best conversion targets are standard email formats like EML or MBOX, or document formats like PDF for archiving. However, because this is a closed, proprietary format tied to legacy software, standard online converters often fail to process it. Just drag and drop your file to identify the format, view it, and convert it when possible. convert.guru can still inspect the file and extract readable text strings or metadata headers. If our analysis detects standard text structures inside, viewing or partial conversion may still be possible.
Convert.Guru analyzes your IMH file, detects the exact format, and lets you read the text inside.
Users also converted LFA, IMK and IMM files.
If you want to convert IMH file to , you can use IncrediMail or similar software from the "Email Message Header Storage" category. In the File menu, look for Save As… or Export….
To convert files to IMH, try IncrediMail or another comparable tool in the "Email Message Header Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our IMH converter.