123 Converter

Convert Lotus 1-2-3 spreadsheets (123) online for free


Drop or upload your .123 file
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How to convert your 123 file

  1. Click the "Select File" button above, and choose your 123 file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.

Convert 123 to another file type

The converter easily converts your 123 spreadsheets to various formats - free and online. No Lotus 1-2-3 or or other Spreadsheet software needed.

  • 123 to XML
  • 123 to HTM
  • 123 to DOCX
  • 123 to XHTML
  • 123 to DOT
  • 123 to XLT
  • 123 to SXM
  • 123 to DIF
  • 123 to XLS
  • 123 to TXT
  • 123 to SXI
  • 123 to POT

Convert a file to 123

To convert other file formats to the "Legacy Spreadsheet File" file type, you need software like Lotus 1-2-3 or a similar tool.


About 123 files

The .123 file format is primarily a legacy spreadsheet file created by Lotus 1-2-3, a popular spreadsheet program originally developed by Lotus Software and later acquired by IBM. These files store data in rows and columns, along with formulas, charts, and formatting. Some newer versions of Lotus 1-2-3 actually saved data within a standard ZIP container disguised with the .123 extension.

The main disadvantage of the .123 format is that it is entirely obsolete. IBM officially ended support for Lotus SmartSuite in 2014. Modern spreadsheet applications like Microsoft Excel no longer support these legacy files natively, making them incredibly difficult to open. Users are often stuck with unreadable historical financial data or locked archives. Furthermore, a .123 file can occasionally represent a PCB123 circuit board design or a simple renamed compressed archive.

You need to convert these files to modern formats to guarantee long-term accessibility. For active editing and calculation, convert to XLSX. If you only need to extract the raw text and values for data science or database import, convert to CSV. For permanent archiving where layout preservation is critical, convert to .PDF/A. Drag and drop your file here to analyze and convert it - free, online, and without installing software.

Use Convert.Guru to open and convert your 123 file.

Users also converted WK4, LWP, WK1, PDF, PSD, CRT, MSO, CDR, XLSX, TXT, ZIP and DAT files.


FAQ

If you want to convert 123 file to DWG, DXF, DGN, RVT, RFA, SKP, 3DM, STEP, IGES, SAT, X_T or X_B, you can use Lotus 1-2-3 or similar software from the "Legacy Spreadsheet Data Storage" category. In the File menu, look for Save As… or Export….

To convert SLDASM, DGN, PRT, IAM, X_B, CATPRODUCT, SLDPRT, RVT, ASM, DWG, CATPART or DXF files to 123, try Lotus 1-2-3 or another comparable tool in the "Legacy Spreadsheet Data Storage" category.



The 123 Converter Story

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 123 converter.