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NPOI

.NET port of Apache POI

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biffdotnetcoreexceloffice-file-apiopenxmlpoiword
github.com/nissl-lab/npoinissl-lab.github.io/npoi/Tony Qu, NPOI Contributors6.2k · 1.5k forks · 184 contributors
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Compares against 2.8.1 (latest stable)
Latest Stable2.8.1Sep 22, 2026
Release cadenceEvery 4 months
Last releaseSep 22, 2026
Open advisories0
Changelog quality0% curated
Notes not indexed yet
Release history SecurityYou're on
2.x
STABLE · RCPRE-RELEASE2024AprJulOct2025AprJulOct2026AprJulOct

18 older or filtered releases not shown.

Upgrade guides

Breaking changes and a migration checklist for each major version
NPOI 1 → 21.2.5 → 2.8.1Sep 22, 2026 Unknown
VersionChannelDateChangesSecurity
2.8.1 StableSep 22, 2026No changes listed2.8.0 StableApr 6, 2026No changes listed2.8.0-preview2 YankedOct 20, 2026No changes listed2.8.0-preview1 YankedOct 20, 2026No changes listed2.7.6 youStableFeb 27, 2026No changes listed2.7.5 StableSep 30, 2025No changes listed2.7.4 StableJun 29, 2025No changes listed2.7.3 StableMar 23, 2025No changes listed2.7.2 StableDeprecated Nov 9, 2024No changes listed2.7.1 StableDeprecated Jul 3, 2024No changes listed2.7.0 StableDeprecated Mar 25, 2024No changes listed2.7.0-rc1 YankedOct 20, 2026No changes listed2.6.2 StableDeprecated Sep 11, 2023No changes listed2.6.2-rc1 YankedDeprecated Oct 20, 2026No changes listed2.6.1 StableDeprecated Jul 11, 2023No changes listed2.6.1-rc2 YankedDeprecated Oct 20, 2026No changes listed2.6.1-rc1 YankedDeprecated Oct 20, 2026No changes listed2.6.0.1 YankedOct 20, 2026No changes listed2.6.0 StableDeprecated Nov 17, 2022No changes listed2.6.0-rc-3 YankedDeprecated Oct 20, 2026No changes listed