Need help? Reach us at 
+1 (855) 418-2323
Need help? Reach us at
+1 (855) 418-2323
File Converters TIFF and PDF apps Forensic Freeware1) Upload 123 file to convert
Drop files here, or Click to select
Allowed file types: fasta, qif, ofx, iif, srt, ics, excel, ris, bib, ods, xls, xlsx, xlsm, csv, tsv, tab, xlsb, xltx, xlr, pxl, qpw, wb3, wq1, dbf, wk3, 123, mdb, evtx, pages, numbers, sqlite
2) Set converting 123 to XLSX options
3) Get converted file
Total Excel Converter
Total 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.With Total Excel Converter you can convert Excel to PDF and add a digital signature in one go.Total Excel Converter can convert each page of your spreadsheet into a separate file.Tell Total Excel Converter to copy original time stamps if you don't want to change the date.Have an outdated Microsoft Office 2003? Update all your old files to the new format in one go. Convert XLS files to XLSX in batches.Total Excel Converter will help you to convert Excel 2003 XML Files (rare option!)Total Excel Converter has a built-in renamer to give your files new descriptive names. Include a counter, a date or worksheet name into the file name and your files will be in perfect order.Convert Excel spread sheets via our most straightforward interface.The 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!Total Excel Converter can combine several Excel spread sheets into one TIFF or PDF file.Want to quickly find a file? Total Excel Converter helps you to preview any document you select.Add your logo or any other image to the header or the footer of the output file.Want more order? Add page counters or a date to every page of the output files. Sequential numbering of several folders is avaialble.Total Excel Converter can copy original time stamps if you want to keep them.When you convert Excel to PDF you can set user permissions, password-protect your files or sign with a digital signature. Get PDF, PDF/A and non-searchable PDFs.Total Excel Converter can be run via command line (get the ready-to-use command line from GUI).💾 Upload Your File: Go to the site, click on «Upload File,» and select your 123 file.
✍️ Set Conversion Options: Choose XLSX as the output format and adjust any additional options if needed.
Convert and Download: Click 👉«Download Converted File»👈 to get your XLSX file.
| File extension | .123 |
| Category | Document File |
| Description | 123 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 programs | Total Excel Converter |
| Developed by | |
| MIME type | |
| Useful links | |
| Conversion type | 123 to XLSX |
| File extension | .XLSX, .EXCEL |
| Category | Document File |
| Description | XLSX 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 programs | Microsoft Excel 2007 OpenOffice OxygenOffice Progessional (Linux) |
| Developed by | Microsoft |
| MIME type | |
| Useful links | More detailed information on XLSX files |
2024-09-09 2022-11-02
Lotus 1-2-3 defined spreadsheet computing in the 1980s and early 1990s. Millions of businesses built financial models, budgets, and databases in .123 files — and those files are still sitting in corporate archives, backup tapes, and old network shares. The problem is that no current version of Microsoft Excel or LibreOffice can open the .123 format natively. Converting .123 files to XLSX brings the data back to life in a format that every modern spreadsheet application, accounting system, and BI tool can read, without installing any legacy software.
A .123 file is a spreadsheet saved by Lotus 1-2-3, developed by Lotus Software and released in 1983. It stored cell data, formulas, and formatting in a compact binary structure optimized for DOS memory constraints. Lotus 1-2-3 introduced the A1 cell reference notation and the @-prefix function syntax (@SUM, @IF) that influenced every spreadsheet application that followed. By the mid-1990s Microsoft Excel had largely displaced Lotus, and .123 file support was eventually removed from modern applications.
| Property | Lotus 1-2-3 (.123) | Microsoft Excel (.xlsx) |
|---|---|---|
| Era | 1983–mid 1990s | 2007–present (OOXML standard) |
| Format type | Proprietary binary | Open standard (ISO/IEC 29500, ZIP + XML) |
| Formula syntax | @-prefix: @SUM, @AVG, @IF | Standard: SUM(), AVERAGE(), IF() |
| Maximum rows (original) | 8,192 rows (Lotus 2.x) | 1,048,576 rows |
| Application support | None in current software | Universal — Excel, LibreOffice, Google Sheets |
| Automation and scripting | Lotus macros (legacy) | VBA, Python (openpyxl), Power Automate |
The converter reads the binary .123 file structure, parsing the record stream that defines cells, formulas, formatting, and sheet layout. Lotus @-prefix formula functions are mapped to their modern Excel equivalents — @SUM becomes SUM(), @AVG becomes AVERAGE(), @IF becomes IF(), and so on. Cell values, number formats, column widths, and row heights are translated to the equivalent XLSX XML structure. The output is a standard .xlsx workbook that Excel, LibreOffice, and Google Sheets can open immediately, without any dependency on Lotus software.
| Feature | Online Converters | CoolUtils Desktop | Excel Built-in | Other Software |
|---|---|---|---|---|
| Batch Conversion | Limited | ✅ Unlimited | Manual only | Limited |
| File Size Limit | 1-5MB | ✅ No limits | System dependent | Varies |
| Privacy & Security | Upload required | ✅ 100% offline | ✅ Local only | Varies |
| Conversion Speed | Internet dependent | ✅ Fast local processing | Slow | Medium |
| Advanced Options | Basic | ✅ Full customization | Limited | Basic |
| Cost | Free/Premium | One-time purchase | Requires Office | Subscription |
| Formatting Preservation | Good | ✅ Excellent | Good | Varies |
| Multiple Formats Support | Limited | ✅ 40+ formats | Few formats | Limited |
