#spreadsheet

Using the Sep CSV library, provides methods for reading and writing CSV files using strongly-typed objects with automatic property mapping and basic type conversion

Lightweight and very fast XLSX Excel Spreadsheet Writer in PHP. Supports full XLSX-file functionality - cell formatting, formulas, styles, charts, etc.

Node.js port of Multi-user SocialCalc

Utility to convert Excel XLSX files to JSON

Provides methods for reading and writing Excel files using strongly-typed objects with automatic property mapping and basic type conversion

Excelize is a C# port of Go Excelize library that allow you to write to and read from XLAM / XLSM / XLSX / XLTM / XLTX files.

A pure rust library for reading and writing spreadsheet files

Zero-dependency TypeScript toolkit for Excel, Word, PDF, CSV, Markdown, XML & ZIP — one API across Node.js, Bun & browsers.

📊 Easily manage & generate spreadsheets. CSV & Excel files supported.

A Python module for creating Excel XLSX files.

MCP server + CLI giving AI agents 50 spreadsheet tools for .xlsx — live-recalc formulas (~390 Excel functions), repair broken references & external links, read/write, diff, and audit. Works in Claude Code, Cursor, Codex, and any MCP client.

AI-Agent-ready CLI framework for editing, testing, running, tracing, and diffing Excel VBA projects.

Elixir library for reading spreadsheets

Programmable spreadsheet platform with a TypeScript/Rust engine, SDK, and embeddable workbook runtime.

Fast, zero-dependency CSV, XLSX and ODS reader/writer for PHP

Powerful virtual data grid smartsheet with advanced customization. Best features from excel plus incredible performance 🔋

The Ruby Spreadsheet by ywesee GmbH

A Teal Insights Python library for generating Excel formula dependency graphs

A minimal state management library inspired by spreadsheets

Lightweight and very fast XLSX Excel Spreadsheet and CSV Reader in PHP

Svelte data table spreadsheet best best features and performance from excel