Open, view and edit Excel (.xlsx / .xls) files in your browser — switch between sheets, click any cell to edit its value, add or remove rows and columns, then download the updated workbook. Everything runs locally — your spreadsheet is never uploaded.
100% in-browser — no upload, no account. This page edits .xlsx / .xls files directly in your browser. For server-side conversion between formats, use the Excel Converter or CSV Converter.
Drop an Excel file here or click to choose
XLSX / XLS — up to 200 MB — parsed locally
XLSX vs XLS — what the file format means
An .xlsx file is a ZIP archive of XML files (the Office Open XML format): one XML part describes each worksheet, another holds the shared strings, and styles live in their own part. That open, well-documented structure is why this page can open, edit and re-save workbooks entirely in your browser. The older .xls format is a single binary file (BIFF) from the Excel 97 era — it can still be opened here, but .xlsx is the smaller, better-supported choice for new work.
.xlsx = ZIP + XML (Office Open XML, the Excel default since 2007); .xls = binary BIFF (Excel 97). For server-side conversion between formats use the Excel Converter.
