How it works
- Choose a signal. Sine, square, triangle or sawtooth tone — or white or pink noise.
- Set frequency and level. 20 Hz to 20 kHz on a logarithmic slider with 440 Hz and 1 kHz presets; level from −60 to 0 dBFS, with a warning when you push past −6.
- Play live or export. Listen in real time through your speakers, or render 1 to 600 seconds to WAV, FLAC or MP3, in mono or stereo.
Features
- Four waveforms plus two noises. Sine, square, triangle and sawtooth from 20 Hz to 20 kHz, white noise, and pink noise (−3 dB per octave).
- Built for real testing. Logarithmic frequency slider, 440 Hz and 1 kHz presets, precise dBFS level control and anti-click fades on start and stop.
- Listen free, export when needed. Live playback is unlimited; rendering a file (1–600 s, WAV / FLAC / MP3, mono or stereo) is one quota use.
- Speaker-safe by default. The level starts at a conservative −12 dBFS and the UI warns you above −6 dBFS — your tweeters and ears will thank you.
FAQ
Is the tone generator free?
Yes — and live playback is completely free and unlimited, no account needed. Only exporting a file counts toward the 5 free daily uses shared across AudioKit's free tools. AudioKit Premium removes that limit.
Do I need to upload anything?
No — there's no file input at all. The signal is synthesized in your browser with the Web Audio API, and exports are rendered locally too. The only network call is the small anonymous counter for the daily export quota.
Which test frequencies should I use?
The two presets cover the classics: 440 Hz is the standard tuning reference (A4), and 1 kHz is the universal line-up tone used for calibrating levels across gear. Beyond those: sweep low frequencies (30–80 Hz) by hand to find where a room or a subwoofer resonates, use 10–15 kHz to check tweeters and hearing range, and use 20 Hz / 20 kHz as the rough limits of human hearing.
What's the difference between white and pink noise?
White noise has equal energy per hertz, so it sounds bright and hissy — most of its audible energy sits in the highs. Pink noise rolls off at −3 dB per octave, giving equal energy per octave, which matches how we hear: it sounds balanced and is the standard choice for checking speaker balance, comparing monitoring setups or rough room diagnostics (pair it with our Spectrogram to see the response).
What can I export, exactly?
A rendered file of 1 to 600 seconds, mono or stereo, at 44.1 kHz, in WAV, FLAC or MP3 — with the same frequency, waveform and dBFS level as the live preview, plus short anti-click fades at the edges. Handy for test discs, tuning references, sleep/masking tracks or feeding a measurement chain. One export counts as one use of the daily free quota.