Top Flutter CSV, Excel, ODS and Sheets packages

Last updated: May 18, 2026

Spreadsheet parsers allow Flutter apps to read massive datasets from Excel (.xlsx) or open-document formats without requiring the user to convert them to CSV first.

Best Practices for Spreadsheets

• Memory Management: Parsing a 50MB .xlsx file entirely into memory will crash a mobile device. Use streaming parsers if available, or process the sheet in a background Isolate to protect the UI thread.
• Date Epochs: Excel stores dates in a proprietary epoch format (number of days since Jan 1, 1900). Ensure the package you use accurately converts these proprietary values back into standard Dart DateTime objects.
• Data Integrity: Spreadsheets are notoriously messy (e.g., a user might type "N/A" into a column meant for Integers). Implement robust error handling when mapping rows to Dart objects to gracefully handle dirty cells.

The complete list of Excel readers, XLSX Generators, and Spreadsheet parsing packages for Flutter is provided below.