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OutWiker

Tree-structured notes and wiki desktop application

Wikis & Documentation ★ 337 stars Easy setup GPL-3.0

OutWiker is a cross-platform desktop application for storing notes and knowledge in a tree structure, functioning as a personal wiki. Each page can use wiki markup, HTML, or Markdown, and plugins extend its capabilities.

Official siteSource code

Key features

  • Tree-structured pages
  • Multiple markup modes
  • Plugin support
  • Cross-platform desktop app

Pros & cons

Strengths

  • Released under the GPL-3.0 license
  • Easy to set up — beginner-friendly
  • Written in Python
  • Tiny footprint — runs in 256 MB RAM

Trade-offs

  • Desktop only
  • No built-in collaboration

Is OutWiker secure?

OSV.dev has no published security advisories for OutWiker's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

OutWiker replaces

Self-hosted Notion alternativesSelf-hosted OneNote alternatives

Health badge

Maintain OutWiker? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 77 · good

Markdown
[![SelfHostIndex health score for OutWiker](https://selfhostindex.com/badge/outwiker.svg)](https://selfhostindex.com/app/outwiker/)
HTML
<a href="https://selfhostindex.com/app/outwiker/"><img src="https://selfhostindex.com/badge/outwiker.svg" alt="SelfHostIndex health score for OutWiker"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/outwiker.svg
   :alt: SelfHostIndex health score for OutWiker
   :target: https://selfhostindex.com/app/outwiker/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Compare OutWiker

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