When you download an application from the Google Play Store , the Android system extracts a file usually named base.apk into the device's internal storage.

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Select and toggle the switch for your browser or file manager.

Review the permissions requested by the app before clicking Install . Critical Safety Warning

Before installing, you can upload the file to VirusTotal to scan it against dozens of antivirus engines.

It is essentially a ZIP file containing the app’s code (compiled Java or Kotlin), resources (images/layouts), and manifest.

While installing APKs from outside the Play Store is not illegal, it can void warranties or violate the Terms of Service for certain apps.