C#★ 179Sep 25, 2026
C#★ 0Oct 21, 2026
JavaScript · HTML★ 3↓ 104.1K/moSep 18, 2026

ClosedXML/ClosedXMLClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.
C#★ 5,686Aug 28, 2026
NuGet34At Riskhealth index
C#★ 12.7KSep 19, 2026
NuGet34At Riskhealth index
C#★ 0Sep 13, 2026
PHP★ 41↓ 4,105/moSep 11, 2026
PHP★ 107↓ 66.8K/moOct 22, 2026
PHP★ 22↓ 9,820/moSep 13, 2026

aVadim483/fast-excel-writerLightweight and very fast XLSX Excel Spreadsheet Writer in PHP. Supports full XLSX-file functionality - cell formatting, formulas, styles, charts, etc.
PHP★ 310↓ 86.8K/moSep 11, 2026
JavaScript★ 15.5K↓ 53.7M/moSep 17, 2026

nissl-lab/npoia .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.
C#★ 6,197Sep 22, 2026
TypeScript★ 10↓ 2,064/moOct 17, 2026
TypeScript★ 1,667↓ 329.5K/moOct 6, 2026
TypeScript★ 5↓ 10.8K/moSep 15, 2026
NuGet29At Riskhealth index

DataJuggler/ExcelerateNuget package DataJuggler.Excelerate uses NOIP and it makes it easy to load and save Excel data, code generate C# classes from header rows and more.
C#★ 8Sep 15, 2026
TypeScript★ 0↓ 6,724/moSep 17, 2026
JavaScript · CSS★ 1↓ 8,957/moOct 20, 2026
TypeScript · JavaScript★ 0↓ 4,423/moSep 18, 2026
PHP★ 1↓ 98.6K/moSep 18, 2026

SheetJS/sheetjs📗 SheetJS Spreadsheet Data Toolkit -- New home https://git.sheetjs.com/SheetJS/sheetjs
Mixed★ 36.3K↓ 44.7M/moSep 17, 2026
Mixed★ 1↓ 53.7K/moSep 15, 2026
NuGet22At Riskhealth index
C#★ 0Sep 6, 2026
npm · NuGet19Criticalhealth index
C# · JavaScript · ASP.NET★ 0Sep 11, 2026

revolist/revogridPowerful virtual data table smartsheet with advanced customization. Best features from excel plus incredible performance 🔋
TypeScript★ 3,443↓ 122.3K/moSep 19, 2026
Python★ 96↓ 11.5M/moAug 27, 2026

mhalungekar9/gridnexaGridNexa is a developer-first Excel-like data grid for React, Vue, Angular, and JavaScript. It includes editing, filtering, undo/redo, fill handle, export, saved views, change review, validation, diagnostics, and one-click repro export for building powerful data-heavy apps faster.
Mixed★ 0Oct 21, 2026

nuovo/spreadsheet-readerA PHP spreadsheet reader (Excel XLS and XLSX, OpenOffice ODS, and variously separated text files) with a singular goal of getting the data out, efficiently
PHP★ 667↓ 11.9K/moOct 4, 2026

ispras/dedocDedoc is a library (service) for automate documents parsing and bringing to a uniform format. It automatically extracts content, logical structure, tables, and meta information from textual electronic documents. (Parse document; Document content extraction; Logical structure extraction; PDF parser; Scanned document parser; DOCX parser; HTML parser
Python · HTML★ 737↓ 509/moOct 19, 2026
TypeScript · Rich Text Format · HTML★ 12↓ 1,658/moSep 11, 2026