DTMF Tone Dialer

Generate DTMF (Dual-Tone Multi-Frequency) tones like a phone keypad. Perfect for testing phone systems, IVR testing, and learning about touch-tone technology.

Settings

Tone Duration

200 ms

How long each tone plays when clicked

Volume: 50%

Show DTMF frequencies

DTMF Frequency Table

DTMF uses two simultaneous tones (one low frequency, one high frequency) for each key:

	1209 Hz	1336 Hz	1477 Hz
697 Hz	1	2	3
770 Hz	4	5	6
852 Hz	7	8	9
941 Hz	*	0	#

About DTMF

DTMF (Dual-Tone Multi-Frequency) signaling is the technology used by touch-tone telephones. Each key press generates two simultaneous tones at specific frequencies.

How It Works

When you press a key, two tones are generated:

Low frequency group: 697, 770, 852, or 941 Hz (row)
High frequency group: 1209, 1336, or 1477 Hz (column)

For example, pressing "5" generates 770 Hz + 1336 Hz simultaneously.

Common Uses

Phone Systems: Navigate IVR (Interactive Voice Response) menus
Testing: Test phone system functionality and audio equipment
Remote Control: Control devices over phone lines
Two-way Radio: Send numeric data over radio channels
Education: Learn about telecommunications technology

Features

Authentic Tones: Generates standard DTMF frequencies
Adjustable Duration: Control how long each tone plays
Volume Control: Set comfortable listening levels
Visual Display: See what you've dialed
Keyboard Support: Type on your keyboard to dial

Tip: You can use your computer keyboard to dial. Press 0-9, *, or # keys to generate tones.

Related Tools

Country Calling Codes Tone Generator

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