Convert CSV to 123
How to convert CSV files to Lotus 1-2-3 (123) format using legacy software and best practices.

How to convert csv to 123 file
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Understanding csv and 123 file formats
CSV (Comma-Separated Values) is a widely used plain text format for storing tabular data, where each line represents a row and columns are separated by commas. It is supported by most spreadsheet and database applications.
123 files are associated with Lotus 1-2-3, a pioneering spreadsheet program. The 123 format is a proprietary binary file type used to store spreadsheet data, formulas, and formatting specific to Lotus 1-2-3.
Why convert csv to 123?
Converting CSV to 123 is necessary when you need to work with data in legacy environments or with users who still rely on Lotus 1-2-3. This conversion ensures compatibility and preserves spreadsheet features unique to the 123 format.
How to convert csv to 123
Direct conversion from CSV to 123 is not commonly supported by modern software. However, you can use older versions of spreadsheet applications or specialized converters. The most reliable method is using Lotus 1-2-3 itself, if available, or IBM Lotus SmartSuite which includes Lotus 1-2-3.
Step-by-step conversion using Lotus 1-2-3
- Open Lotus 1-2-3 or IBM Lotus SmartSuite.
- Go to File → Import and select CSV as the file type.
- Browse and open your CSV file.
- Review the imported data for accuracy.
- Save the file by choosing File → Save As and select Lotus 1-2-3 Worksheet (*.123) as the format.
Best software for csv to 123 conversion
- IBM Lotus SmartSuite (includes Lotus 1-2-3) – Best for direct and accurate conversion.
- Gnumeric – Can open CSV and export to older Lotus formats, though not always to .123 specifically.
- Online converters – Rare for this format, but some legacy file conversion services may support it.
Tips and considerations
- Ensure your CSV data does not exceed the row and column limits of Lotus 1-2-3.
- Formatting and formulas may not transfer perfectly; review the 123 file after conversion.
- Consider converting to more modern formats if possible, as 123 is largely obsolete.
Note: This csv to 123 conversion record is incomplete, must be verified, and may contain inaccuracies. Please vote below whether you found this information helpful or not.