DTMF Generator
Tap the keys or type a sequence and play it.
Each key plays two simultaneous tones, exactly like a real phone keypad.
Last key
Tap a key to hear its tone.
Key
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Frequencies
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Play real DTMF phone keypad tones, the dual tones behind every keypress. Tap the keypad or type a number sequence to dial it out loud.
Tap the keys or type a sequence and play it.
Tap a key to hear its tone.
DTMF stands for dual-tone multi-frequency: each key mixes one low tone (697 to 941 Hz) with one high tone (1209 to 1633 Hz). The pair is unique per key, which is how phone systems decode presses reliably even over noisy lines.
Developers use DTMF to test IVR menus, voicemail systems, and phone bots. Hold your phone near the speaker while playing a sequence to punch digits into automated systems hands-free.