CW/Morse Decoder

Decode CW (continuous wave) Morse code. Supports HF amateur bands (USB + Goertzel tone detection) and ISM/UHF OOK signals (AM + envelope detection).

Detection Mode

CW Tone: HF bands, USB demod, Goertzel filter. For amateur CW.

Frequency

Frequency (MHz) Enter CW center frequency in MHz (e.g., 7.030 for 40m).

Band Presets

Device

Gain (dB)

PPM Correction

CW Detector

Tone Frequency: 700 Hz

Bandwidth

Auto Tone Track Hold Tone Lock

Threshold + WPM

Threshold Mode

Threshold Multiplier

Threshold Offset

Manual Threshold

Minimum Signal Gate

WPM Mode

Manual Speed: 15 WPM

Lock WPM Estimator

Output

Show Raw Morse Show Decoder Logs

Decode WAV File

Runs the same CW decoder pipeline against uploaded WAV audio.

Morse Reference (click to toggle)

A .-

B -...

C -.-.

D -..

E .

F ..-.

G --.

H ....

I ..

J .---

K -.-

L .-..

M --

N -.

O ---

P .--.

Q --.-

R .-.

S ...

T -

U ..-

V ...-

W .--

X -..-

Y -.--

Z --..

0 -----

1 .----

2 ..---

3 ...--

4 ....-

5 .....

6 -....

7 --...

8 ---..

9 ----.

Standby 0 chars

CW on HF (1-30 MHz) requires an HF-capable SDR path (direct sampling or upconverter) and an appropriate antenna.

OOK Envelope mode uses AM demodulation to detect carrier on/off keying. Suitable for ISM-band (315/433/868/915 MHz) Morse transmitters.