Extract text from Mail index files (SKINDEX)
To convert SKINDEX Index files to another format, you need Apple Mail or other Database software.
To convert other file formats to the "Mail Index Database" file type, you need software like Apple Mail or a similar tool.
A .SKINDEX file is an internal Mail Index File created by Apple Mail on macOS. It is designed to catalog and index email messages stored inside mailbox directories (usually MBOX folders). By maintaining this index, the mail client can perform lightning-fast searches through thousands of stored emails.
These files are natively generated and managed by Apple Mail. You cannot open them as standard documents, as they operate strictly in the background of the operating system.
Users typically encounter .SKINDEX files when manually backing up their email directories, recovering data, or migrating to a new computer. A major disadvantage is that this format is completely proprietary and undocumented. Furthermore, it does not contain the actual email content, body text, or attachments - only the search parameters and metadata. This causes frustration for users who try to open the file expecting to read their old emails or extract contacts.
Because it is a pure system database index rather than a document or media file, converting a .SKINDEX to standard formats like PDF or DOCX is not directly possible or useful. If you want to read your emails, you must locate and convert the accompanying MBOX files instead.
This file format is exceptionally difficult to process because only the original Apple Mail software understands its unique internal structure. Standard online converters will fail to process it. If our analysis detects a supported underlying or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your SKINDEX file, detects the exact format, and lets you read the text inside.
Users also converted PNG and TMP files.
If you want to convert SKINDEX file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use Apple Mail or similar software from the "Email Search Indexing" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to SKINDEX, try Apple Mail or another comparable tool in the "Email Search Indexing" 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 SKINDEX converter.