Key Chain
Keep
Android's system credential store that lets apps use certificates and private keys you have approved.
Android (AOSP) package
Certificate Installer
Keep: com.android.certinstaller Keep Vendor documentation
The system tool that installs security certificates for Wi-Fi, VPN and work networks. Keep it: Certificate Installer is needed for the phone, its updates or its security.
What it does
Certificate Installer is the Android component that opens when you install a certificate file from the encryption and credentials settings or from an app. It adds CA certificates, user certificates and Wi-Fi certificates to the phone's credential storage so that work Wi-Fi, VPNs and some company apps can trust or present them. It runs only during an install.
If you disable it
You cannot install certificates, so work Wi-Fi, VPNs and apps that need a custom certificate cannot be set up, and community lists report Wi-Fi problems after removing it.
How to disable it
On most phones Settings greys out Disable for this package, so ADB is the way to turn it off. The commands below work without root and can be undone.
Disable it (reversible)
adb shell pm disable-user --user 0 com.android.certinstallerTurn it back on
adb shell pm enable com.android.certinstallerThe stronger option removes it for your user only; the original copy stays on the phone and a factory reset brings it back. Prefer disabling: it is easier to undo.
Uninstall for the main user
adb shell pm uninstall -k --user 0 com.android.certinstallerRestore after an uninstall
adb shell cmd package install-existing com.android.certinstallerNew to ADB? Set it up in about ten minutes.
Data and battery
Stores the certificates you install in the phone's credential storage.
Where it appears
- Made by Android Open Source Project.
Questions people ask
What is com.android.certinstaller?
com.android.certinstaller is Certificate Installer. The system tool that installs security certificates for Wi-Fi, VPN and work networks.
Can I disable Certificate Installer?
Keep it: Certificate Installer is needed for the phone, its updates or its security. On most phones it takes ADB.
What happens if I disable Certificate Installer?
You cannot install certificates, so work Wi-Fi, VPNs and apps that need a custom certificate cannot be set up, and community lists report Wi-Fi problems after removing it.
Sources
- Android source: CertInstaller manifestAndroid source
- Pixel Phone Help: Add and remove certificatesVendor documentation
- Universal Android Debloater list entryCommunity list
Each source answered when this page was checked on 25 October 2026.
Confidence: Vendor documentation. Backed by the maker's own documentation, the Android source or the Play listing. How we decide a verdict.
Cite this page: https://mysystemapp.com/packages/com.android.certinstaller/ (verified 25 October 2026). Something wrong or out of date? Request a correction.