Recomp / Apps & creative tools / Windows

Apache POI

Java library that reads and writes Word, Excel, PowerPoint, Visio and Outlook files, including the legacy binary formats it originally reverse engineered.

Clean-room Human-led released
Stars2.3k
Commits, 30 days130
Latest release—
Last pushOct 13, 2026

GitHub figures as of 2026-10-14, refreshed daily.

Facts

Original
Microsoft Office file formats
Platform
Windows
Method
Clean-room
Provenance
Human-led · Apache Software Foundation project since 2001 what this means
Status
released
Licence
Apache-2.0
Team
Apache Software Foundation
Started
2001
Runs on
Java
Needs the original
No

How to get it legally

Download it from the official repository or website. No original files are needed.

This project was rebuilt clean-room by Apache Software Foundation. Facts last checked 2026-10-13.

Sources

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