How does iPhone open url files?

Apple iPhone's Safari browser is the default web browser, and you can use Safari browser to open URL files. Here are the steps to open a URL file on the iPhone:

First, find the URL file on your iPhone. You can get URL files through email attachments, messages, airdrops, iCloud Drive, etc.

Open the file manager, find the URL file, and then click it.

In the options menu that opens, select an open method or a sharing option.

In the pop-up menu, select Safari option.

Safari browser will open automatically and display URL address in the address bar. Click the Go button to open the webpage.

If you want to save a URL file to a Safari bookmark, just open the URL file in Safari, click the Share button, and then select the Add Bookmark option.

Please note that some URL files may be invalid or damaged, or contain harmful links or content, so please open URL files carefully. It is recommended to open only URL files that you trust or URL files from trusted sources.