Welcome to the modern-xlsx wiki — comprehensive knowledge base for the library.

Current version: v0.6.1

• Getting Started — Installation, setup, and your first spreadsheet
• Browser & CDN — Use directly in browsers via jsDelivr or unpkg
• API Reference — Complete API documentation
• Styling Guide — Fonts, fills, borders, alignment, number formats
• Examples — Common patterns and recipes
• Feature Comparison — modern-xlsx vs SheetJS (250 features compared)
• Performance — Benchmarks, optimization tips, and architecture
• Encryption Guide — Read and write encrypted XLSX files
• FAQ — Common questions and troubleshooting

• Migration from SheetJS — Side-by-side API comparison
• Migration from ExcelJS — ExcelJS → modern-xlsx patterns

• Architecture — Rust WASM + TypeScript hybrid design
• Changelog — Release history

• GitHub Repository
• npm Package
• Documentation Site
• Interactive Playground
• Issue Tracker

• File Encryption (read/write) — full ECMA-376 Agile & Standard encryption support
  • Read password-protected XLSX files created by Excel, LibreOffice, Google Sheets
  • Write encrypted XLSX files with AES-256-CBC + SHA-512 (Agile Encryption)
  • readBuffer(data, { password }) and wb.toBuffer({ password }) — simple API
  • Standard Encryption (legacy) — SHA-1 / AES-128-ECB for older Excel formats
  • OLE2 compound document detection, parsing, and writing
  • SensitiveKey RAII — automatic zeroization of key material in memory
  • Constant-time password verification — timing-safe comparisons
  • HMAC-SHA-512 integrity verification for tamper detection
• Full Changelog