Web GDB

GDB (multiarch) running in a web-browser!

Learn how to use Web GDB on Wokwi.com

How can I use it?

To use Web GDB on Wokwi, open any project (e.g. this Simon game), click on the code editor, and press F1. In the prompt that opens, type "GDB":

Choose the "debug build" option (the release build is harder to debug, but it's useful if your program uses the FastLED library). Web GDB will load in a new browser tab (you have to be a bit patient), and you should get the familiar GDB prompt:

0x00000000 in __vectors ()
(gdb)

At this point, you can write continue to start the program, or better - check out the Arduino/AVR GDB Cheatsheet to see all the things GDB can do for you!

A live version of Web GDB is hosted on GitHub pages.

How does it work?

Great question, you'll find the answer in my Running GDB in the Browser blog post.