About this tool
A working DTMF dialer that plays the two-frequency touch-tones of a telephone keypad in your browser using the Web Audio API.
Frequently asked questions
What are DTMF tones?
Each phone key plays two simultaneous tones — one from a row and one from a column — which telephone systems decode as the dialed digit.
Is the dialed string sent anywhere?
No, everything runs locally in your browser; the dialed digits are only shown on screen.