Sheetifye #

The Native High-Performance Spreadsheet & Excel Engine for Flutter #

Sheetifye is a professional-grade Flutter Excel viewer, CSV reader, and spreadsheet renderer built for speed and flexibility. It provides a native, virtualized grid capable of rendering millions of cells with ease, making it the ultimate spreadsheet UI for Flutter developers.

📱 iOS

🤖 Android

🌐 Web / Desktop

📖 Documentation  ·  💡 Gallery Example  ·  📋 Release Notes  ·  🐛 Report Issue

🚀 Feature Highlights #

• ⚡ High-Performance Virtualization: Smooth spreadsheet viewer experience with 60+ FPS, even with millions of rows and columns.
• 📦 Native XLSX & CSV Support: Built-in parsers for Excel and CSV files that work locally without external dependencies or heavy WebViews.
• 🎨 Full Theming: Matches your app’s ThemeData automatically or via a dedicated SheetifyeThemeData.
• 🖱️ Interactive Grid: Advanced selection system supporting single-cell, range selection, and keyboard navigation.
• 📐 Merged Cells: Pixel-perfect rendering of complex layouts and merged regions.
• ⌨️ Integrated Formula Bar: View raw cell data and computed formulas in a professional Excel-like UI.
• 🌐 Cross-Platform: Optimized for touch on Mobile and mouse/keyboard on Desktop and Web.

Why Sheetifye? #

Most Flutter Excel packages rely on slow WebViews or lack professional features like virtualization and cell selection. Sheetifye is a custom-built spreadsheet engine that paints directly to the Flutter canvas.

• No WebView / No PlatformView: 100% native Flutter rendering.
• Offline First: Works entirely offline with a local XLSX parser.
• Memory Efficient: Uses a specialized LRU cache for formula management and rendering.
• Developer Friendly: Drop-in widget that handles all the complexity of Excel layouts.

Supported Platforms #

Installation #

Add sheetifye to your pubspec.yaml:

flutter pub add sheetifye

Or manually:

dependencies:
  sheetifye: ^1.0.2

Quick Start #

1. Initialize State #

Sheetifye uses Riverpod for high-performance state management. Wrap your app in a ProviderScope:

void main() {
  runApp(const ProviderScope(child: MyApp()));
}

2. Add the Spreadsheet Viewer #

import 'package:sheetifye/sheetifye.dart';

class MyExcelView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Sheetifye.asset('assets/reports/sales_2024.xlsx'),
    );
  }
}

Usage Examples #

📁 Load from Assets #

Perfect for bundling static templates or reports with your application.

Sheetifye.asset('assets/template.xlsx')

🌐 Load from Network #

Fetch and render remote spreadsheets directly from your API or Cloud Storage.

Sheetifye.network('https://example.com/data.xlsx')

💾 Load from File #

Ideal for apps that interact with the local device storage or downloads.

Sheetifye.file(File('/storage/emulated/0/Download/report.xlsx'))

🧠 Load from Memory #

Useful when receiving bytes from a file picker or an encrypted source.

Sheetifye.memory(excelBytes)

Technical Details #

🏗️ Architecture #

Sheetifye follows a Refined Monolithic Architecture optimized for speed. The rendering pipeline uses a multi-stage process:

1. Virtualization: Identifies only visible cells.
2. Layout: Computes pixel-perfect positions.
3. Painting: Draws directly to the Canvas in a single pass.

⚡ Performance #

Designed for High-Performance Spreadsheet needs.

• Memory Footprint: ~45MB for a 50,000-row dataset.
• Scroll Latency: < 1ms on modern devices.
• Background Parsing: XLSX files are processed in a separate isolate to prevent UI jank.

📑 XLSX & CSV Support #

Our native XLSX & CSV parser handles:

• Multi-sheet workbooks (XLSX)
• Standard CSV files
• Cell styling (bold, italic, colors)
• Column widths and row heights
• Merged cell regions
• Calculated formula results

Custom Theming #

Make your Excel Grid Flutter implementation look exactly like your app.

Sheetifye.asset(
  'assets/data.xlsx',
  theme: SheetifyeThemeData(
    primaryColor: Colors.deepPurple,
    headerBackground: Colors.grey[50],
    gridColor: Colors.blueGrey[100],
    fontFamily: 'Inter',
  ),
)

Comparison Section #

Roadmap #

• ✅ v1.0.0: Native XLSX Viewer & Virtualized Grid
• ❌ v1.1.0: Basic Cell Editing & In-memory Updates
• ❌ v1.2.0: Live Formula Re-calculation Engine
• ❌ v2.0.0: Advanced Styling, Charts & Conditional Formatting

Contributing #

We welcome contributions to make Sheetifye the best Flutter spreadsheet package! Check out our Contributing Guide to get started.

License #

Sheetifye is released under the MIT License. See LICENSE for details.