WASM

April 22, 2026

Making Rust Workers reliable: panic and abort recovery in wasmbindgen

Panics in Rust Workers were historically fatal, poisoning the entire instance. By collaborating upstream on the wasmbindgen project, Rust Workers now support resilient critical error recovery, including panic unwinding using WebAssembly Exception Handling.

April 2, 2024

Bringing Python to Workers using Pyodide and WebAssembly

Introducing Cloudflare Workers in Python, now in open beta! We've revamped our systems to support Python, from the runtime to deployment. Learn about Python Worker's lifecycle, dynamic linking, and memory snapshots in this post

August 14, 2023

Wasm core dumps and debugging Rust in Cloudflare Workers

Debugging Rust and Wasm with Cloudflare Workers involves a lot of the good old time-consuming and nerve-wracking printf'ing strategy. What if theres a better way? This blog is about enabling and using Wasm core dumps and how you can easily debug Rust in Cloudflare Workers

March 24, 2023

Use the language of your choice with Pages Functions via WebAssembly

Today Pages is excited to offer support for WebAssembly when writing a Pages Function

August 1, 2022

Running Zig with WASI on Cloudflare Workers

After the recent announcement regarding WASI support in Workers I decided to see what it would take to get code written in Zig to run as a Worker, and it turned out to be pretty trivial. This post documents the process I followed

July 7, 2022

Announcing support for WASI on Cloudflare Workers

Today, we are announcing experimental support for WASI (the WebAssembly System Interface) on Cloudflare Workers and support within wrangler2 to make it a joy to work with

September 9, 2021

Native Rust support on Cloudflare Workers

Introducing the Cloudflare Workers Rust SDK: write your entire Worker in Rust, no JavaScript required.

October 6, 2020

Let's build a Cloudflare Worker with WebAssembly and Haskell

Let's combine the power of Haskell and WebAssembly in a Cloudflare Worker!