Where WebAssembly Gets Real

WASM I/O 2026 · 19 - 20 Mar · Barcelona

Wasm I/O is a two-day conference focused on the WebAssembly ecosystem.
Join us in our fourth edition!

Be part of it!

The WASM
Conference
in Europe

Join the WebAssembly community from around the world for two days of deep technical sessions. There is no better place to share, discuss, collaborate and socialize with other WebAssembly professionals.

WASM I/O 2026 will take place in the beautiful city of Barcelona. Don’t miss the chance to join us and shape the future of WebAssembly!

2 days

19 - 20 Mar 2026

Barcelona

An unbeatable location

Call for papers

Want to share your knowledge / experience or have an interesting story? Presenting at Wasm I/O is an awesome opportunity to engage with the Wasm community.

Send us your talk (50 min) or workshop sessions (2 hours) for more in-depth coverage of topics.

We welcome proposals from everyone, and will evaluate each proposal.

Send your Proposal

Secure
your ticket!

Early Bird
Conference Ticket WASM I/O 26

Early Bird

299 €

Until December 4th

All Things Webassembly

Get your Ticket Today

Barcelona

Mar • 19- 20 • 2026

2-Day Conference
AXA Convention Center
Standard
After 4th Dec

Standard

4th Dec 25 - 19 Feb 26
Late Bird
After 19th Feb

Late Bird

24 Feb 26 - 18 Mar 26

Take a look
at last year's edition

Discover Barcelona

Wasm I/O will be held at the AXA Convention Center which part of an enormous complex located on the main artery of Barcelona. City communications are excellent and access from Barcelona’s Airport and Sants Station is very quick.

Barcelona is a city with a wide range of original leisure options that encourage you to visit time and time again. Overlooking the Mediterranean Sea, and famous for Gaudí and other Art Nouveau architecture, Barcelona is one of Europe’s trendiest cities.