This tab will now list extensions found in your local repository.
Altium will read the local directory and list the offline extensions under the "Available" category.
Altium stores downloaded installation files in a hidden cache. You need to point your offline Altium instance to a folder containing these files.
Click the icon (the down-arrow icon) next to the specific extension you need (e.g., PDN Analyzer , MCAD CoDesigner , or specific importer/exporter tools).
Compared to , which uses a standard plugin manager that can point to local directories easily, or OrCAD/Cadence , which uses standard Windows installers for add-ons, Altium’s method feels proprietary and fragile. Most CAD software treats add-ons as standard installers; Altium treats them as part of its cloud ecosystem, making the offline user feel like a second-class citizen. altium extension offline install
💡 This is your go-to method for manual, one-off installation of a specific extension, especially if it’s from a third-party provider.
After unzipping the package on your local machine, you must point Altium Designer to this local folder instead of the cloud. Open Altium Designer and go to (Shortcut: TP ). Navigate to System > Installation . Select the "Offline installation" radio button.
Click the (the down arrow) on the specific extension card you want to add.
Ensure you are using an offline repository package that exactly matches the build version of your installed Altium Designer. Mixing files from different build versions will cause dependency conflicts. Issue 3: Licensing / Subscription Warnings This tab will now list extensions found in
When your workstation has internet access, Altium manages these via the page, pulling files dynamically. For offline machines, you must replicate this repository locally or package the files manually.
To help narrow down your deployment strategy, could you tell me: What are you trying to install?
The extension requires a core system file or dependency that was missing from your offline package.
Once the package is on your target machine, you must redirect Altium Designer to use this local folder instead of the internet. You need to point your offline Altium instance
Altium packages its software and extensions into comprehensive offline repositories. You must download these repository files first. Open your web browser on the internet-connected computer.
Browse for your .adextension file and proceed with the installation. Troubleshooting Offline Installation
The network administrator must configure the internal enterprise server to host the extension packages.
If you cannot see the "Need Offline Installer" link, sign out of your Altium Live account and sign back in.