Is it safe to delete VSCodium extensions?
The extensions you've installed in VSCodium, in one folder for each extension.
Review first
It's your own data, or hard to recreate. Decide item by item.
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What it is
VSCodium, like other builds of VS Code's open-source code, installs extensions into this folder, separate from VS Code's own. It can grow large when you use extensions that bundle language servers or debuggers. Extensions you no longer use stay here until you uninstall them. Removing the whole folder uninstalls all of your extensions.
If it's removed
Features that come from an extension you uninstall stop working until you install it again.
What to do instead
In VSCodium, open the Extensions view, click the Manage button next to an extension you no longer use, and choose Uninstall.
The free analyzer finds it and explains it, with these steps. The app doesn't remove it for you.
Sources
Last checked on 26 Sep 2026. Every entry is written and checked by hand; the app and the command-line tool use the same words.