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LibreOffice core — The large cross-platform codebase behind Writer, Calc, Impress, and Draw

OSS health 76
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Stars
4,372
Primary language
C++
License
GPL-3.0
Repository last updated
Sep 17, 2026

Overview

LibreOffice is a free and open-source office suite covering Writer, Calc, Impress, Draw, and more. This repository contains a roughly 200-module core source tree built around C++, UNO, VCL, and related technologies. GitHub is a read-only mirror, and the official download page listed LibreOffice 26.8.0 on September 17, 2026.

Features and best fit

Based on official documentation; not hands-on tested · Content checked:

One shared core supports Writer, Calc, Impress, and Draw

Writer lives under sw/, Calc under sc/, and Draw/Impress under sd/, while VCL, the UNO framework, document models, and other shared modules support the suite as a whole.

Sources: [2]

A large C++ codebase spanning UNO, VCL, Java, Python, and platform toolchains

The README describes roughly 200 modules and recommends working in the core codebase for generally useful features rather than relying only on UNO extensions. Java and Python are also involved in parts of the build and runtime tooling.

Sources: [2]

For users wanting an open desktop office suite and developers studying a large C++ application

It is also a substantial reference codebase for document formats, rendering, accessibility, internationalization, and cross-platform desktop engineering.

Sources: [2]

GitHub is read-only: contribution and source-download workflows live elsewhere

Repository metadata directs contributors to Gerrit instead of GitHub pull requests and recommends official source bundles rather than GitHub ZIP downloads. Review component-specific licensing when redistributing or modifying the suite.

Sources: [1][2]

Official sources

  1. [1]LibreOffice/core — GitHub repository metadata(2026-09-17)
  2. [2]LibreOffice core — README(2026-09-17)
  3. [3]LibreOffice — Official download page(2026-09-17)
Supplemental curator note

Beyond the office suite itself, this is a roughly 200-module C++ desktop application codebase. GitHub is a read-only mirror.

Try it in 3 steps

  1. 1

    Get the source

    git clone --depth 1 https://github.com/LibreOffice/core.git
  2. 2

    Enter the repository

    cd core
  3. 3

    Check the official steps

    Continue with the commands in the README Installation, Quick Start, or Getting Started section.

    find . -maxdepth 1 -iname 'README*' -exec sed -n '1,220p' {} \; -quit
Check the official README

Growth

Growth trends · Last 30 days

4,372 Stars

Trend data is still being collected.

Development activity

Last 90 days · weekly

Commits (last 30 days)
1,027
Open PRs
0

Development activity is still being collected.

Built with

Categories and tags

Categories

GitHub data

GitHub dataView detailed GitHub data

GitHub Topics

  • libreoffice
  • tdf
Stars
4,372
Forks
944
Watchers
101
Open issues
0
Primary language
C++
License
GPL-3.0
Repository last updated
Sep 17, 2026
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