Morse Code Trainer
The Koch method teaches Morse the way operators actually copy it: characters play at full speed (15–25 WPM) from the very first lesson, starting with just two letters and adding one more each time you reach 90% accuracy. Missed letters are drilled more often until they catch up. Pick the tone pitch, add light background noise, optionally hear each character spoken after the Morse (eyes-closed practice), and insert extra silence between words only. Practice mode drills 20 characters; Storm mode is 60 seconds with combo bonuses. Download the last session as a WAV when you finish.
Runs 100% in your browser — nothing you type or practice leaves your device.
Read the full guide to this tool
Notes
- Koch order (K, M, R, S, U, A, …) starts with maximally distinct sounds; learning at full character speed avoids the "counting dits" plateau that slow-speed methods hit.
- Word gap adds silence every N characters without slowing the dits and dahs inside a character — character speed stays fixed.
- Audio uses your browser's WebAudio — use headphones and set a comfortable volume before starting.
- Runs 100% in your browser — nothing you type or practice leaves your device.
Related tools
Geography Quiz
Flags, capitals and map click — world regions or a US states & territories pack.
Periodic Table Quiz
Click the table, drag tiles, type-race the blank grid, or MC — with filters and a fact card after each answer.
Speed Reading Trainer (RSVP)
RSVP at 100–1000 WPM with live speed, rewind, real WPM history and dyslexia-friendly options.
Final Grade Calculator
What do you need on the final exam to reach your target grade? Instant answer for any weight.
GPA Calculator
Compute your GPA from course grades and credits — or ask what term GPA you need to hit a cumulative goal.
Math Worksheet Generator
Printable worksheets: arithmetic, fractions, algebra, order of ops, decimals, mixed numbers and percents.