Depending on your operating system or preference for online tools, here are the most reliable options available: How to Import Large XML File (WXR file) in WordPress
When migrating a site or importing content, hitting the is a common roadblock. If your export file is several megabytes or even gigabytes in size, standard server settings will often trigger timeouts or "file size exceeds" errors. wordpress wxr file splitter download
A is the essential solution to this problem, breaking down a massive "WordPress eXtended RSS" (WXR) XML file into smaller chunks that can be uploaded sequentially. Top WordPress WXR File Splitter Downloads & Tools Depending on your operating system or preference for