Products · Spreadsheet Editor

Workbooks that calculate, right in the browser

Open .xlsx files in an Excel-style grid, edit values and formulas, and save a workbook Excel opens as its own.

Get startedSee the code
q3-sales.xlsx
D7fx=SUM(D3:D6)
ABCD
2RegionQ1Q2Q3
3North18,24021,07524,310
4South12,90011,48015,060
5East9,61513,23012,775
6West16,42017,90520,140
7Total57,17563,69072,285
SalesTargets

~170

functions

.xlsx

and .xlsb open

PDF

printing with the page setup

Excel 2010

conditional formatting rules

Features

What Spreadsheet Editor does

01

Formulas

  • About 170 functions, recalculated as you type
  • Shared and array formulas, defined names
  • Structured references to tables
  • Status-bar sum, average and count
q3-sales.xlsx
D7fx=SUM(D3:D6)
ABCD
2RegionQ1Q2Q3
3North18,24021,07524,310
4South12,90011,48015,060
5East9,61513,23012,775
6West16,42017,90520,140
7Total57,17563,69072,285
SalesTargets
02

Working with data

  • Conditional formatting, including the Excel 2010 rules
  • Format as Table, with banded styles and filters
  • Sort, fill handle, copy and paste
  • Data validation with list drop-downs and alerts
03

Looks like the file

  • Number formats, fonts, borders, fills and merges
  • Frozen panes, hidden rows and columns
  • Charts and pictures from the workbook
  • Notes and threaded comments
04

Output

  • Save as .xlsx
  • Print to PDF with the page setup, headers and footers
  • Annotate right on the grid; marks go back into the .xlsx
  • Opens .xlsb workbooks and saves them as .xlsx

At a glance

Everything included

No add-ons and no tiers: every item here ships in the same package, free under MIT.

  • Formulas
  • Shared formulas
  • Array formulas
  • Defined names
  • Structured references
  • Conditional formatting
  • Tables
  • Filters
  • Sort
  • Fill handle
  • Copy and paste
  • Data validation
  • Notes
  • Threaded comments
  • Charts
  • Pictures
  • Frozen panes
  • Merged cells
  • Number formats
  • Print to PDF

For developers

The same few lines in JavaScript and .NET

One engine behind both packages, so behaviour and output match on every platform.

Getting started API reference
app.js
const book = ExcelDocument.open(bytes);book.command({ cmd: 'select', cell: 'D7' });book.command({ cmd: 'enter', text: '=SUM(D3:D6)' });const xlsx = book.save();

Used in these workflows

Life sciences & pharmaReview and approve regulated documentsFinance & accountingStatements, workbooks and approvalsEducationGrade, comment and hand back work

Works well with

Word Editor

Edit .docx with real page layout

Learn more

Document Viewer

PDF, Word and Excel in one fast viewer

Learn more

Server & Automation

Node.js, .NET, C and the command line

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Add Spreadsheet Editor to your app

Free under the MIT licence, for the browser, Node.js and .NET.

Get startedRead the docs