To save the file on your phone, simply tap on the three dots in the top right-hand corner and click on Save copy. It works in the same way from the smartphone to the computer.

The Single File browser extension can save web pages as self-contained HTML files that are readable offline, and Obsidian has a free web clipper that works in tandem with its desktop app.

To confirm, tap the HTML file. The left is the page saved as an HTML file, and the right is the original page viewed in Safari. I was able to save it accurately, including the image, without the ...