Web platform features explorer

Memory64 (WebAssembly)

Limited availability
Tags: webassembly Groups: WebAssembly

Instructions accept 64-bit memory indexes.

Learning resources on MDN

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Browser support

Baseline availability blocked since February 2025 by Safari (2 months)