An Otter Wiki is a minimalistic wiki built on Python and Flask, storing every page as Markdown inside a git repository. There is no database behind it: the git history is the revision history, so every edit, author and revert is already recorded and browsable. It suits team documentation, a personal knowledge base or a project handbook that you want to keep as plain text you own.

Editing and Markdown

• A CodeMirror editor with Markdown syntax highlighting and a live preview; tables are supported directly in the editor.
• Extended Markdown beyond the basics: tables, footnotes, fancy blocks, alerts and Mermaid diagrams.
• Page attachments for files and images, plus emoji and full UTF-8 support.
• Full page history and changelog, read straight from the git commits that back the wiki.

Navigation and access

• A collapsible sidebar you can configure as a hand-written menu, an automatically generated page index, or both.
• A clean reading interface with a dark mode, breadcrumbs and an “On this page” table of contents.
• User authentication with the first registered account acting as administrator, so it can be opened to a team or kept private.
• Site-wide search over page titles and content.

Deployment

• Distributed as the redimp/otterwiki Docker image; the documented setup is a short docker-compose.yml with a single volume mounted at /app-data.
• Because all content is plain Markdown in git, pages can be backed up, diffed or migrated with ordinary git commands — no export step.
• An experimental built-in git HTTP server lets you clone, pull and push the wiki content from a normal git client.
• MIT licensed, actively developed, and installed behind any reverse proxy (nginx, Apache or Caddy examples are in the documentation).

Alternatives

• Pepperminty Wiki — a single-file PHP wiki with Markdown pages and no database.
• Raneto — a Markdown knowledge base for Node.js that builds its pages from files on disk.