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<li><a href="https://github.com/laurent22/joplin/blob/dev/BUILD.md">How to build the apps</a></li>
<li><a href="/spec/e2ee/">End-to-end encryption spec</a></li>
<li><a href="/spec/history/">Note History spec</a></li>
<li><a href="/spec/sync_lock/">Sync Lock spec</a></li>
<li><a href="/spec/plugins/">Plugin Architecture spec</a></li>
<li><a href="/spec/search_sorting/">Search Sorting spec</a></li>
<li><a href="/spec/server_file_url_format/">Server: File URL Format</a></li>
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<h1>Development mode<a name="development-mode" href="#development-mode" class="heading-anchor">🔗</a></h1>
<p>When experimenting with Joplin, for example when <a href="/api/get_started/plugins/">developing a plugin</a> or trying a theme, you might want to run Joplin in development mode. Doing this will open a second copy of Joplin using a different profile with test notes and notebooks, so you can experiment without risking changing or deleting your data.</p>
<p>To enable Development Mode, go to <strong>Help > Copy dev mode command to clipboard</strong>. This will copy a command to your clipboard. Paste this command in a shell / terminal to run a development version of the app.</p>
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