Where can I watch Demon Slayer Infinity Castle online?

As of today, I can’t confirm a legal online streaming release for Demon Slayer: Infinity Castle yet. The safest current expectation is that it will be released in theaters first, and any online availability would come later.

For legal viewing, the best places to check are:

• the official Demon Slayer website or local distributor pages
• Crunchyroll’s official news/releases
• your country’s major digital stores, such as Apple TV, Amazon, or Google TV/YouTube Movies, if and when a rental or purchase becomes available

Availability can vary by country and release window, so exact dates and platforms can change. If you want, I can help you narrow down the likely legal options for your region.