CW Letter Trainer
Learn Morse letters by sound in ten stages, then test your copying under progressively harder conditions.
ModeCallsign Trainer
AudioReady
Current WPM20 WPM
Sidetone600 Hz
CW Letter Trainer
Hear one Morse letter, then answer on the QWERTY keyboard. Build recognition by sound instead of counting.
Training stages
Stage 1 unlockedStage1 / 10
Speed8 WPM
Recent0 / 20
Stage letters
New: E TE T
Reach 17 correct answers in the latest 20 to unlock the next stage.
Press Start to hear a letter
Choose an unlocked stage, then start listening.
Score0
Correct0 / 30
Streak0
Challenge status
5 second answerStart a signed 30-question challenge when you are ready.
No replay. Difficulty rises from 8 WPM clean audio to 20 WPM with noise and weak CW QRM.
Ready for question 1
Letter Challenge Leaderboard
| Rank | Operator | Score | Correct | Streak | Time |
|---|---|---|---|---|---|
| Open Challenge to load the leaderboard. | |||||
Callsign Trainer
Listen to a randomized callsign, type what you copied, and build a clean streak.
Listen and copy
1 / 20??????
Accuracy0%
Streak0
Score0
Result
LivePress Play to hear the first callsign.
Recent copies
No attempts yet.
Challenge copy
2 hoursREADY
Score0
Correct0 / 10
Streak0
Replays0
Challenge status
Server verifiedStart when you are ready. The difficulty increases every round.
Submit score
LeaderboardOnly your final score summary is saved. Callsigns, answers, and full IP addresses are not stored.
Leaderboard
| Rank | Operator | Score | Correct | Streak | Time |
|---|---|---|---|---|---|
| Open Challenge to load the leaderboard. | |||||
With thanks to HB9BZA, who compiled and freely shared the LoTW Users List with the amateur radio community.
QSO Simulator
Walk through a short CW contact: CQ, report, name, QTH, and 73.
Current exchange
Step 1CQ CQ DE BA7MTH BA7MTH K
Copy0%
Exchange1 / 6
XP0
QSO transcript
RX/TXMorse Translator
Listen to CW from a microphone or shared system audio and decode it into characters in real time.
Audio input
MicrophoneSignal detector
IdlePeak tone-- Hz
Signal-- dB
Timing20 WPM
Decoded text
IdleWaiting for audio.
High confidence
Possible
Uncertain
Live Morse
Dit / dah...
Choose an input source, then start listening.
Auto-tunes narrow CW tones from 350 to 1000 Hz. Microphone access requires permission.
Maidenhead Grid Locator
Find a six-character QTH grid from a map, your location, an address, coordinates, or another locator.
Latitude0.000000
Longitude0.000000
Maidenhead LocatorJJ00aa
Current position
Local GPSLocation is requested only after you press the button. Coordinates and the calculated grid stay in this browser.
Find an address
Up to 5 resultsCoordinates to Locator
Decimal or DMSLocator to map
2, 4, 6, or 8 charactersDrag the map or choose a lookup method.