Altium Extension Offline Install May 2026

Most official Altium extensions support offline installation, including:

Remember that even if the extension is installed, Altium Designer itself requires a license. altium extension offline install

Once the path is set, Altium will "see" the extensions available in that folder as if they were live on the web. Stay in the tab. Click on the Purchased or Installed sub-tab. Click on the Purchased or Installed sub-tab

Extensions often have dependencies. If you manually copied only one folder, the installation might fail. Always copy the full "Repository" structure provided in the offline installer download. Always copy the full "Repository" structure provided in

| Issue | Likely Cause | Solution | |-------|--------------|----------| | Extension not found | Wrong Altium version | Download extension matching exact Altium build number | | Missing dependencies | Not all prerequisite extensions downloaded | Download entire dependency tree (use --include-dependencies flag) | | “Invalid license” | Licensing service offline | Ensure network license server is accessible or use standalone license | | Installation fails silently | Corrupted .alf file | Re-download extension and verify hash |

Since the standard installer requires an active internet connection, you must download a standalone package first: