MI to TXT Converter

MI to TXT Conversion Explained

Converting .MI (PTC Creo Elements/Direct Drafting, formerly ME10) to .TXT (plain text) changes a 2D CAD drawing into a raw text document. People perform this conversion to extract text annotations, Bill of Materials (BOM) data, title block metadata, or to view raw ASCII CAD commands.

When you convert .MI to .TXT, you gain human-readable data that is easy to parse with scripts or import into databases. However, you lose all visual geometry, lines, arcs, layers, and graphical representation. If you need to see the actual drawing, this conversion is a bad idea. You should only convert .MI to .TXT when you want to extract the text data embedded inside the CAD file.

Typical Tasks and Users

• CAD Administrators: Extracting BOMs and part numbers from legacy drawings to import into ERP systems.
• Software Engineers: Writing scripts to parse title block data, such as author names, creation dates, and revision histories.
• Data Archivists: Migrating legacy ME10 metadata into modern searchable databases.
• Drafting Technicians: Debugging corrupted .MI files by reading the raw ASCII command structure.

Software & Tool Support

• PTC Creo Elements/Direct Drafting: The native software can save drawings as ASCII .MI or export text directly.
• Notepad++ or Visual Studio Code: Useful for opening and reading .MI files that are already saved in ASCII format.
• Command-line tools: Utilities like grep, awk, or custom Python scripts can extract specific text strings from ASCII .MI files.
• Convert.Guru: A web-based tool that extracts text from both binary and ASCII .MI files without requiring a CAD license.

Pros and Cons of the Conversion

• Pros:

  • Makes CAD metadata accessible to non-CAD software and databases.
  • Allows version control systems (like Git) to track text changes.
  • Drastically reduces file size when you only need the annotation data.

• Cons:

  • Total loss of visual geometry and drawing layout.
  • Extracted text loses spatial context; you cannot tell where the text was located on the original drawing.
  • Binary .MI files require specialized decoding before text extraction is possible.

Conversion Difficulties & Why Convert.Guru

The main technical problem in this conversion is the file encoding. .MI files can be saved in either binary or ASCII formats. Extracting text from a binary .MI file requires decoding a proprietary PTC format. Even in ASCII mode, text strings are mixed with CAD commands (for example, TEXT 'Part Number 123'). Furthermore, older ME10 files often use legacy character encodings like HP-Roman8 instead of modern UTF-8, which causes garbled text when opened in standard editors.

Convert.Guru handles these technical hurdles automatically. It detects whether the .MI file is binary or ASCII, manages legacy character encodings, and strips away the CAD geometry commands. The pipeline extracts only the clean text annotations and metadata, providing a ready-to-use .TXT file. This saves you from writing custom regex parsers or buying expensive CAD licenses just to read drawing notes.

MI vs. TXT: What is the better choice?

Which format should you choose?

Choose .MI if you need to edit the drawing, view the geometry, or send the file to a manufacturer for production.

Choose .TXT if you only need the text data, such as part numbers, BOMs, or revision notes, to process in a script or import into a database.

Avoid this conversion if you want a viewable document for non-CAD users. If you need to share a visual representation of the drawing, convert the .MI file to .PDF or .DXF instead.

Conclusion

Converting .MI to .TXT makes sense for data extraction, BOM generation, and metadata parsing, but it permanently destroys the visual drawing. The biggest limitation to watch for is the loss of spatial context—your extracted text will not show where it belonged on the original CAD sheet. Convert.Guru is a reliable choice for this exact conversion because it accurately decodes proprietary binary structures and legacy character encodings, delivering clean plain text without requiring native PTC software.