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XLSX Studio — Excel Viewer & Editor

Open, edit and save Excel workbooks offline — multiple sheets, formulas, formatting and exports.

Support
Works Offline
Privacy First
No Login
No API
File API

About the XLSX Studio — Excel Viewer & Editor

Open XLSX, XLS, ODS, CSV or TSV files in a spreadsheet grid that runs entirely in your browser. Edit cells inline, use a formula bar with SUM, AVERAGE, IF, CONCAT and more, add, rename, duplicate or delete sheets, insert and remove rows and columns, apply bold, italic, colors, alignment and number formats, sort, search, find duplicates, undo up to 50 steps, and export back to XLSX or to CSV, TSV, JSON and Markdown.

Examples

Total a column

=SUM(B2:B6)

Output

Live total that updates as you edit

Label a row

=IF(D2>=1,"Complete","In progress")

Output

Complete

Keyboard shortcuts

  • Copy the main outputCtrl / ⌘ + Shift + C
  • Download the resultCtrl / ⌘ + S
  • Share this toolCtrl / ⌘ + Shift + S
  • Reset the inputsAlt + R
  • Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Read more

Version 1.0.0 · Updated 2026-10-12 · Runs entirely in your browser