Fesod is a Java library for processing spreadsheets at scale without memory exhaustion.
The tool addresses the challenge of handling large Excel and CSV files that would typically cause out-of-memory errors in traditional spreadsheet processing approaches. It achieves this through streaming-based processing that reads and writes data incrementally rather than loading entire files into memory at once. This design allows developers to work with spreadsheets of arbitrary size while maintaining predictable memory consumption.
Fesod suits projects that need to parse, transform, or generate Excel and CSV files as part of data pipelines, ETL workflows, or batch processing systems. It is particularly valuable when file sizes are unpredictable or when processing must run in memory-constrained environments. The library supports both reading and writing operations across XLS, XLSX, and CSV formats, making it applicable to a wide range of spreadsheet-based data workflows.
The project shows consistent maintenance activity with regular updates addressing bug fixes and feature improvements. Development follows a structured release cycle with attention to stability and backward compatibility. The codebase demonstrates active engagement with user-reported issues and a commitment to keeping dependencies current.
