Sound Tools
Synthesizers, sound effects and sound generation in your browser
9 free tools — no ads, no sign-up, everything runs in your browser.
Ambient Noise Generator
Blend white, pink and brown noise live in your browser — focus masking, tinnitus relief and sleep, with a built-in sleep timer.
Audio BPM Tap & Tempo Detector
Tap a beat or detect tempo from audio sample onsets with robust local signal analysis.
Audio dBFS, dBu, dBV & Voltage Converter
Convert digital and analog audio levels with professional and consumer references
Binaural Noise Synthesizer
Create binaural beats with white, pink, or brown noise
Metronome & Instrument Tuner
Keep visual tempo and tune instruments around an adjustable A4 reference.
Morse Spectrogram Decoder
Encode and decode Morse code audio with deterministic timing
Text to Speech (TTS)
Read any text aloud with your browser's built-in voices — control voice, rate, pitch and volume, all processed on your device.
Voice & Audio Recorder
Record microphone audio locally and download a WebM recording when ready.
Web Audio Modular Synthesizer & Sound FX Generator
A full synth voice designer running entirely in your browser: seven oscillator flavors (sine, saw, triangle, square with real PWM duty control, white/pink/brown noise), a visual ADSR envelope, resonant biquad filtering, an LFO routed to pitch, filter or gain, and an effects chain of tanh overdrive, stereo ping-pong delay and Schroeder reverb. Play the two-octave keyboard with your mouse, the printed computer keys (A W S E D…) or a Web MIDI controller, watch the live FFT spectrum and scrolling waterfall spectrogram, fire retro game SFX one-shots (jump, laser, coin, powerup, explosion, click), then export your sound as 8/16/24-bit WAV or as dependency-free Web Audio code you can paste into any project.