XLSX Studio — Excel Viewer & Editor
Open, edit and save Excel workbooks offline — 50+ formulas with autocomplete, filters, conditional formatting, charts and PDF export.
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. Select ranges, fill formulas down or right with relative and absolute ($A$1) references, copy and paste with Excel or Google Sheets, and see live Sum, Average and Count for the selection. Formulas include SUM, AVERAGE, IF, SUMIF, COUNTIF, AVERAGEIF, IFERROR, VLOOKUP, XLOOKUP, INDEX and MATCH. Filter rows by column conditions, highlight cells with conditional formatting rules, add borders, get formula autocomplete with argument hints, use date, text and statistics functions, find and replace, resize columns, freeze the top row or first column, build bar, line and pie charts (SVG/PNG), and export to XLSX, PDF, CSV, TSV, JSON or Markdown.
Popular uses
- xlsx viewer
- excel editor online
- open xlsx
- excel viewer
- edit excel offline
- xls viewer
- ods viewer
- spreadsheet editor
Examples
Total a column
=SUM(B2:B6)Output
Live total that updates as you editLook up a price
=XLOOKUP("Pro",A2:A10,C2:C10,"Not found")Output
Price for the Pro rowConditional total
=SUMIF(B2:B20,"Paid",D2:D20)Output
Sum of paid invoicesKeyboard 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
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- Open and edit Excel files offline in your browser with XLSX Studio
View and edit XLSX, XLS and ODS workbooks without uploading them: multiple sheets, live formulas, formatting and exports to XLSX, CSV, JSON and Markdown.
Version 1.2.0 · Updated 2026-10-25 · Runs entirely in your browser