XLS Viewer & Editor - Open & Convert Legacy Excel 97-2003 Files Online

Easily open legacy Microsoft Excel 97-2003 binary spreadsheets (.xls). Inspect ledger tables, edit cell entries, and upgrade older .xls files to modern .xlsx or .csv formats in seconds.

1. Step 1: Upload your legacy .xls file.
2. Step 2: View data tables across worksheets.
3. Step 3: Edit numbers and text values inside the interactive grid.
4. Step 4: Convert and download as modern XLSX or CSV.

Why convert .xls to .xlsx?

.xlsx is the modern open XML spreadsheet format, offering higher security, better compression, and smaller file sizes.