OpenCW
Learn Morse code the smart way — using the Koch method, mobile-friendly and distraction-free.
Start Training →Koch Method
Start with two characters at full speed and gradually expand your character set as you improve.
Mobile Friendly
Built from scratch to work great on any screen size — no tiny buttons or horizontal scrolling.
Community Forum
Discuss radio, share tips, and connect with fellow amateur radio operators.
About this website
What can you do here?
Learn Morse code by the Koch method, discuss radio in the forum, and read useful blog posts.
Built with
SvelteKit & TypeScript on the frontend. Gin with Go for the backend.
About me
I am a radio amateur who passed the license exam in 2024. After passing the Morse code test, I'll get my call sign and start my radio journey.
I'm also an amateur software developer. Check out my GitHub profile.