All Tools
75 free browser tools for audio, hearing and devices. Everything runs locally, with no sign-up.
Speaker & Output Tests
Speaker TestLeft and right speaker check, phase and sweep for any speaker…Left Right Audio TestPlay sound in the left or right channel only to check earphones and…Sound TestQuick playback check with low, mid and high tones and…Tone GeneratorPrecise tones from 20 Hz to 20 kHz in four…Bass TestLow-frequency tones and sweeps for subwoofers and…Surround Sound TestCheck every channel of a 5.1 or 7.1 surround…Headphone TestFree headphone test: check left and right channels, stereo imaging, polarity, bass extension…Stereo TestCheck left and right channels, stereo width and imaging with voice-free test signals: channel…Phase & Polarity TestFind speakers wired out of phase with in-phase and inverted bass and noise signals, plus an…Frequency SweepRun logarithmic and linear sine sweeps, 20–200 Hz bass sweeps, sine bursts and an…Frequency TestStep through low and high test frequencies to find the lowest bass and highest treble your…Subwoofer TestTest your subwoofer with kick drums, crossover sweeps, harmonic distortion checks and a bass…Distortion TestHear harmonic and intermodulation distortion with clean sine tones, dual-tone IMD signals and a…Dynamic Range TestCheck how quiet your system can play cleanly with low-level tones, dynamic test tones, 16-bit…White NoisePlay white noise in your browser for sleep, focus, tinnitus relief or audio testing. Endless,…Pink NoisePlay pink noise in your browser for sleep, focus, tinnitus relief or audio testing. Endless,…Brown NoisePlay brown noise in your browser for sleep, focus, tinnitus relief or audio testing. Endless,…Noise GeneratorGenerate six colours of noise in your browser: white, pink, brown, blue, violet and grey. Ideal…Impulse TestPlay sharp impulses and clicks to hear room echo and reverberation, check left/right timing and…Audio IllusionsHear the endless rising Shepard tone, missing-fundamental and binaural tricks, and learn why…Binaural BeatsCreate binaural beats in your browser with a custom carrier and beat frequency, presets for…DTMF Tone GeneratorGenerate DTMF touch tones for every key 0–9, *, # and A–D. Dial a whole number, see both…Signal GeneratorA flexible audio signal generator: single sine or other waveforms, dual-tone mixes and custom…SpectroTyperType a word and hear it as sound that draws your text on a spectrogram. Watch it appear in our…Test FilesCreate downloadable WAV test files on your device: sine, sweep, white and pink noise at 44.1,…Speaker Test TonesA set of reference tones from 20 Hz to 20 kHz in octave steps, plus 1 kHz alignment tone and…MATT TestThe musical acoustics test plays rapid bass tone bursts so you can hear how evenly your room…Polarity TestFree speaker polarity test: play in-polarity and reversed-polarity signals to find a speaker…Balance TestFree audio balance test: play a centred voice-band signal and pan steps from left to right to…Volume TestFree volume test: play a reference tone in 6 dB steps to check that your speakers or headphones…Audio TestFree online audio test: check left, right, stereo, bass, treble and noise playback in one…
Hearing Tests & Ear Training
Mosquito TonePlay “mosquito” high-frequency tones from 14 to 22 kHz and find out which ones you can still…Blind Listening TestRun ABX blind tests on level, pitch, frequency limit, timing, dynamic range, bit depth and…Ear TrainingTrain your ears like an audio engineer: identify boosted octave bands, cuts and narrow notches…Hearing TestCheck your hearing at standard audiogram frequencies for each ear. Find your quietest audible…Hearing Age TestA rising high-frequency tone estimates your “hearing age” from the highest pitch you can hear.…High Frequency Hearing TestFind the highest frequency you can hear with a slow rising tone from 10 to 22 kHz, then confirm…Tinnitus Frequency MatcherMatch the pitch of your tinnitus with an adjustable tone or narrow-band noise, then use it for…
Microphone & Recording Tools
Mic TestLive level meter, waveform and playback for your…Decibel MeterEstimate how loud your room is with live, min, avg and…Voice RecorderRecord your voice in the browser and download the file. Private: audio stays on your device.…Loudness MeterMeasure loudness in LUFS from your microphone or system audio with momentary, short-term and…File Loudness MeterDrop an audio file to measure integrated LUFS, short-term max, loudness range and peak. Compare…Spectrum AnalyzerWatch the frequency spectrum of your microphone in real time with peak frequency readout.…SpectrogramA live spectrogram (waterfall) from your microphone: time on the x-axis, frequency on the…OscilloscopeSee the live waveform of your microphone signal like an oscilloscope, with level readout.…Room Noise TestMeasure the background noise in your room, find hum frequencies and see if it is quiet enough…Audio Latency TestMeasure round-trip audio latency with a loopback click, or estimate Bluetooth delay by tapping…MetronomeA precise online metronome from 30 to 300 BPM with accented downbeats, time signatures and tap…
Instrument Tuners
Guitar TunerFree online guitar tuner: tune with your microphone and see note, cents and direction. Six…Bass Guitar TunerFree online bass guitar tuner: tune with your microphone and see note, cents and direction.…Ukulele TunerFree online ukulele tuner: tune with your microphone and see note, cents and direction.…Violin TunerFree online violin tuner: tune with your microphone and see note, cents and direction. Tune G3,…Viola TunerFree online viola tuner: tune with your microphone and see note, cents and direction. Tune C3,…Cello TunerFree online cello tuner: tune with your microphone and see note, cents and direction. Tune C2,…Banjo TunerFree online banjo tuner: tune with your microphone and see note, cents and direction.…Mandolin TunerFree online mandolin tuner: tune with your microphone and see note, cents and direction. Tune…Guitalele TunerFree online guitalele tuner: tune with your microphone and see note, cents and direction. Six…Chromatic TunerFree online chromatic tuner: detects any note from your microphone with cents deviation and…Pitch DetectorFree online pitch detector: sing or play into your microphone and see the exact frequency in Hz…Note FinderIdentify the note you sing, hum or play with your microphone; see the note name, octave and…
Device Tests
Webcam TestFree webcam test in your browser: live preview, resolution, frame rate, camera selection,…Online MirrorA free online mirror using your front camera. Check your look before a call, with flip and…Keyboard TestFree online keyboard test: press keys to light them up on a full keyboard layout. See key…Mouse TestFree mouse test: check left, right, middle and side mouse buttons, detect unwanted double…Spacebar ClickerCount how many times you press the spacebar in 5, 10, 30 or 60 seconds and see your presses per…Controller TestTest Xbox, PlayStation, Switch and generic controllers: buttons, analog triggers, stick axes,…Dead Pixel TestFill your screen with solid colours to spot dead, stuck and hot pixels, backlight bleed and…Stuck Pixel FixerFlash rapidly changing colours over a stuck pixel to try to revive it. Includes a…Monitor TestFull-screen solid colours and greys to check uniformity, backlight bleed and colour accuracy of…Refresh Rate TestMeasure your display refresh rate in the browser and confirm a high refresh monitor is really…Touch Screen TestDraw across your touch screen to find unresponsive areas, check edge response and test the…Multi-Touch TestPlace several fingers on the screen to see how many simultaneous touch points your device…Accelerometer TestRead live X, Y and Z acceleration from your phone or tablet and see a bubble level move as you…Gyroscope TestRead alpha, beta and gamma rotation angles from your device’s gyroscope and orientation…Vibration TestTrigger short, long and patterned vibrations to test the vibration motor on Android…
Guides & Troubleshooting
Microphone Settings GuideHow to select, enable and adjust your microphone on every version of Windows, on macOS and on…Webcam Settings GuideHow to enable, select and adjust your webcam on Windows 10 and 11 and macOS, including privacy…Discord Mic Not WorkingStep-by-step fixes when Discord cannot hear your microphone: input device, permissions, input…Zoom Camera Not WorkingFix Zoom when it cannot find or show your webcam: permissions, camera selection, other apps,…YouTube No SoundFix YouTube videos with no sound on Windows, Mac, Android and iPhone: player mute, tab mute,…Middle Mouse Button Not WorkingWhy the middle mouse button or scroll click stops working and how to fix it: settings, drivers,…Fix One Speaker Not WorkingFix audio playing from only one speaker or one earbud: balance, mono audio, cables, Bluetooth,…How to Test SpeakersHow to test speakers at home by ear in about ten minutes: left and right channels, phase,…Wired vs Wireless AudioCompare wired and wireless audio: latency, sound quality, Bluetooth codecs, battery, gaming,…Decibels ExplainedUnderstand decibels: what a dB is, A vs C weighting, why +3 dB doubles power, how to measure…Safe Noise LevelsHow loud is too loud? Safe exposure times by decibel, headphone safety, workplace and classroom…Hearing Health GuideHow online hearing tests work, what results mean, signs of high-frequency hearing loss, and how…Noise Colors ExplainedWhite vs pink vs brown noise and blue, violet and grey: how they sound, how their spectra…Recording Audio GuideHow to record your voice, computer audio, calls and podcasts on Windows, Mac and phones, choose…MethodologyHow SoundsChecker generates test signals, measures levels and pitch, and what accuracy you can…No Sound on WindowsComputer has no sound on Windows 11 or 10? Work through 12 fixes: output device, mute, drivers,…No Sound on MacMac has no sound? Fix output selection, mute, Bluetooth routing, Core Audio restarts, safe mode…Mic Not WorkingMicrophone not working? Fix permissions, input selection, levels, drivers and app settings on…Headphones Only One SideHeadphones only playing on one side? Find whether it is the plug, cable, balance setting, mono…One Earbud Not WorkingOnly one earbud working? Reset, recharge and re-pair your true wireless earbuds, clean the…Speakers CracklingSpeakers crackling, popping or buzzing? Separate cable faults, ground loops, driver damage and…Laptop Speakers Too QuietLaptop volume too low even at 100 %? Raise every volume stage, enable loudness equalisation,…Bluetooth Audio DelayBluetooth audio lagging behind video or games? Learn why Bluetooth adds latency, measure it and…Subwoofer Not WorkingSubwoofer not producing bass? Check power, auto-standby, cabling, crossover, receiver speaker…Webcam Not WorkingWebcam not detected or showing black? Fix privacy permissions, apps holding the camera,…How to Test a SubwooferHow to test a subwoofer at home: check that it plays, find its lowest note, hunt rattles with a…How to Test HeadphonesHow to test headphones at home: channels, balance, frequency range, polarity, distortion,…Hearing Frequency Test ExplainedA hearing frequency test plays tones across the hearing range. Learn what 20 Hz–20 kHz means,…Decibel Levels ChartDecibel levels chart for everyday sounds from whispers to fireworks, with recommended safe…What Is LUFSWhat LUFS means, how it differs from dB and peak level, and the loudness targets used by…White vs Pink vs Brown NoiseWhite, pink and brown noise compared: how they sound, how their spectra differ, and what the…How to Tune a GuitarHow to tune a guitar to standard tuning E A D G B E using an online microphone tuner, plus tips…Keyboard Ghosting ExplainedWhat keyboard ghosting, key blocking and N-key rollover mean, why cheap keyboards drop key…Fix Mouse Double ClickingMouse double clicks on a single press? Test it online, then check settings, debounce software,…What Note Am I SingingFind out what note you are singing with a live pitch detector, read cents, and work out your…
Device tools overview
Screen, keyboard, camera and touch tests
Find these in the device tests section above.