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123 to XLSX online converter


1) Upload 123 file to convert


Drop files here, or Click to select
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Allowed file types: ris, bib, xls, xlsx, csv, tsv, tab, xlsb, xltx, xlr, pxl, qpw, wb3, wq1, dbf, wk3, 123, mdb, odt

2) Set converting 123 to XLSX options

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3) Get converted file

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okTotal Excel Converter supports almost all Excel extensions: XLS, XLSX, XLSM, XLSB, XLT, XLTM, XLTX, XLK, XLW. When the new Office is released, we will add new file types too.
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okHave an outdated Microsoft Office 2003? Update all your old files to the new format in one go. Convert XLS files to XLSX in batches.
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okThe widest list of output file types: DOC, PDF, HTML, MHT, XHTML, CSV, TXT, TIFF, JPEG, SVG, RTF, XML, XLS, XLSX, ODS, ODT, Lotus, DIFF, SYLK, LATEX, SQL, DBF, Access!
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123 File

File extension .123
CategoryDocument File
Description123 Lotus is a file format used by the Lotus 1-2-3 spreadsheet program, which was popular in the 1980s and 1990s. The 123 Lotus format is used for storing data in a tabular format, allowing users to easily organize and manipulate large sets of data.

The 123 Lotus format is based on a system of worksheets, which consist of rows and columns that can be used to store and manipulate data. The format includes features such as formulas, macros, and charts, which allow users to perform complex calculations and generate graphical representations of their data.

Although the Lotus 1-2-3 program is no longer as widely used as it once was, the 123 Lotus format remains a common file format for older spreadsheets and datasets. While newer spreadsheet programs such as Microsoft Excel have largely supplanted Lotus 1-2-3, many users still maintain legacy datasets in the 123 Lotus format and may need to convert these files to more modern formats in order to use them with newer software.

In summary, 123 Lotus is a file format used by the Lotus 1-2-3 spreadsheet program for storing data in a tabular format. While the program is no longer widely used, the 123 Lotus format remains a common file format for older datasets and may require conversion for use with modern software.

Associated programsTotal Excel Converter
Developed by
MIME type
Useful links


File extension .XLSX, .EXCEL
CategoryDocument File
DescriptionXLSX is a format from Office Open XML family, a native MS Excel file type starting from version 2007. As opposite to XLS, this format uses ZIP compression that makes XLSX files smaller in size. Actually XLSX file is an archive of XML-documents. The cells in XLSX table can contain plain text, formulas or graphic elements. XLSX can be read in MS Office 2007 and later, Universal Viewer, OpenOffice, MS Office Excel Viewer, Corel WordPerfect Office. This format doesn’t support macros.
Associated programsMicrosoft Excel 2007
OxygenOffice Progessional (Linux)
Developed byMicrosoft
MIME type
Useful linksMore detailed information on XLSX files


Online 123 to XLSX conversion

In the era of early computing, Lotus 1-2-3 was the spreadsheet program that set the standard. However, as technology evolved, Microsoft Excel emerged as the predominant spreadsheet software, making XLSX the more commonly used file format today.

Why the Need for Conversion?

While Lotus 1-2-3 files are still in use, they suffer from a lack of support in modern computing environments. The primary reasons for converting these to XLSX files include:

Online Conversion: A Practical Approach

There are various tools available online to perform this conversion. The benefits of using online converters include:

  1. No need for software installation.
  2. Ease of use and quick conversion.

Security Concerns

When using online services, be wary of uploading sensitive information. Always opt for reputed platforms that ensure data encryption and secure transfer.


Transitioning from Lotus 1-2-3 to XLSX is often necessary in today's computing landscape. Online converters can make this process seamless, although security should not be overlooked.

Is it safe to convert 123 to XLSX Online?

Our tool converts an uploaded copy of your original file. The original file stays on your computer and is unaffected by the process. There is no risk of data loss by conversion.

Also, your data is safe with us. We delete all uploads from our servers after one hour. In other words, an hour after you upload your files, those files are purged from our servers forever. You don't need to worry about your content being stored on the server.

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Rating 123 to XLSX   5 star 123 to XLSX   4.9 (1143 votes)
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