# mini-software/MiniExcel

Lightweight, fast and simple cross-platform processing tool for importing and exporting spreadsheet documents. Built in .NET & Rust.

Repository: https://github.com/mini-software/MiniExcel
Canonical: https://ross.abutalabs.com/products/miniexcel
Homepage: https://mini-software.github.io/MiniExcel
Language: C#
License: Apache-2.0
License Family: permissive
Topics: miniexcel, excel, xlsx, openxml, csv, excel-report
Last push: 2026-08-23T08:04:51+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 2011, "days_push": 10, "days_rel": 11, "gap_med": 29.0, "n_releases_24m": 21}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3523, forks 424 (observed 2026-08-28T04:08:08.012224+00:00)

## What it is
MiniExcel is a lightweight .NET library (with a Rust variant) for reading and writing Excel XLSX and CSV files using row-by-row streaming to minimize memory usage. It avoids loading entire workbooks into memory, preventing out-of-memory issues on large spreadsheets.

## Use cases
- export large datasets to excel without running out of memory
- read xlsx files row by row in .net
- generate excel reports from c#
- import csv and xlsx data into dotnet applications
- process huge spreadsheets with low memory footprint
- convert ienumerable to excel file

## When to choose
- you need to read or write large Excel/CSV files in .NET with minimal memory usage
- you want a simple, fast API without the overhead of full Excel object models
- you need cross-platform spreadsheet processing without Excel installation

## When to avoid
- you need advanced Excel features like charts, pivot tables, or cell formatting manipulation
- you need to modify existing complex workbooks in place
- you are not working in .NET or Rust

## Facets
- artifact type: library
- maturity: active
- function: serialization, file-system, csv, developer-tools
- domain: files, spreadsheets, cross-platform
- platform: dotnet, rust, cross-platform
- tags: excel, xlsx, openxml, streaming, low-memory, spreadsheet-import-export, excel-report, data-engineering

## Member repositories
- mini-software/MiniExcel (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:08.012224+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:35:11.676952+00:00, confidence not recorded.
  - readme: https://github.com/mini-software/MiniExcel (fetched 2026-08-28T04:08:08.012224+00:00, sha ac487b0f75b2)
  - homepage: https://mini-software.github.io/MiniExcel (fetched 2026-08-29T09:29:11.783175+00:00, sha 7597c0121f32)
- Data as of 2026-08-30T08:39:29.467469+00:00.