The best tools on the market either:

The Evolution of Android App Distribution: Navigating XAPK to APK Conversion

Strictly speaking, ZArchiver is a file manager. However, it is the most effective for mobile users because it treats XAPK exactly like a ZIP file.

For power users on Windows or Linux, the xapk-to-apk script on GitHub provides a command-line way to build a "classic fat APK" from a split app bundle.

Since an XAPK is essentially a renamed ZIP file, ZArchiver allows you to open the archive, extract the .apk file, and move the OBB folder to Android/obb/ yourself. 3. XAPK Installer (by Uptodown)

Converting XAPK to a standard APK is often requested to simplify sharing or to bypass the need for third-party installers. Top Tools for XAPK Conversion and Installation

Let’s walk through the most reliable method: (The Top Mobile Converter).

If you don't want to download extra software, you can perform a "manual conversion" using any PC or file manager: Change .xapk to .zip .