Which MIME types are related to file extension ".wk3"?
The .wk3 file extension is associated with 2 MIME types:
application/lotus123, application/vnd.lotus-1-2-3.
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
About .wk3 Files
WK3 files are legacy Lotus 1-2-3 Worksheet 3.0 documents.
They store spreadsheet data such as numbers, text, and formulas in a binary format.
The files are associated with the MIME types application/lotus123 and application/vnd.lotus-1-2-3.
- Primary use: Managing and calculating data in spreadsheets.
- Technical details: Developed for Lotus 1-2-3 systems, these files use a proprietary binary format.
- Software support: Openable in Lotus 1-2-3, and often convertible using modern applications like Microsoft Excel or LibreOffice Calc.
- Legacy relevance: Useful for accessing and converting older business documents.
Relationship between file extension and MIME type
A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.
File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.
File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.
Associated MIME types
application/lotus123, application/vnd.lotus-1-2-3
FAQs
What is a WK3 file?
A WK3 file is a spreadsheet created by Lotus 1-2-3 version 3.0, a popular program from the DOS era. It stores data in a grid of rows and columns, including formulas and formatting, using a proprietary binary structure.
How can I open a WK3 file in Microsoft Excel?
Modern versions of Excel (2013 and later) have dropped native support for .wk3 files. To open them, you should first open the file in LibreOffice Calc or an older version of Excel, and then save it as a modern .xlsx file.
What software can convert WK3 files to CSV or XLSX?
LibreOffice Calc is the most reliable free tool for converting legacy Lotus files. Simply open the .wk3 file in Calc and use the Save As feature to convert it to .xlsx (Excel) or .csv (Comma Separated Values).
What are the MIME types for WK3 files?
These files are typically identified by the MIME types application/lotus123 or application/vnd.lotus-1-2-3. You can learn more about configuring servers for these types at mime-type.com.
Can I open WK3 files on a Mac?
Yes, you can use LibreOffice for Mac to view and edit these files. Native Mac applications like Apple Numbers generally do not support the legacy Lotus 1-2-3 format.
Are WK3 files dangerous to open?
While generally safe, legacy spreadsheet files can contain macros or formulas that modern security software might flag. It is best to scan the file with antivirus software and open it in a restricted mode or a virtual machine if the source is untrusted.
General FAQ
What is a MIME type?
A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.
MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.
How do I find the MIME type for a file?
You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.
Why can one extension have multiple MIME types?
Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.