Audio, Video & Device Tests
Test your microphone and camera, record your screen and trim audio, directly in your browser.
All tools
21
Audio Converter
Convert several audio files to 16 or 24-bit WAV, Opus or AAC in your browser, change the sample rate and channels, and download one ZIP. MP3 is not offered.
Audio Trimmer
Cut a part out of an audio file in your browser: drag handles or type times, add fades, preview, then save as WAV, Opus or AAC. It does not write MP3.
BPM Tapper
Find a tempo in BPM by tapping a button or space bar, or from an audio file in your browser. Shows the tempo name and how steady your taps are.
Click Speed Test
Count your clicks per second in 1, 5, 10, 30 or 60 seconds, or with the spacebar. See your rate, rhythm and jitter. Timed in your browser.
Dead Pixel Test
Find dead and stuck pixels with full-screen solid colours: black, white, red, green, blue and 50% grey. Runs in your browser, nothing is stored.
Decibel Meter
Measure sound level with a microphone: dBFS, a dB SPL estimate after calibration, A-weighting, low, high and average, and a 60-second chart. Estimates only.
Gamepad Tester
Test a game controller in your browser: every button and trigger, both sticks with their dead zones, a vibration test and the mapping the browser reports.
Guitar Tuner
Tune your guitar, bass, ukulele, violin or bağlama with your microphone. A needle shows how many cents sharp or flat each note is. Nothing is recorded.
Keyboard Tester
Test every key of your keyboard in the browser. See which keys register, their event.key and event.code values, and how many keys you can hold at once.
Microphone Test
Test your microphone in the browser: a live level meter in dBFS, a waveform and a 5-second recording to play back. Nothing is uploaded or stored.
Monitor Refresh Rate Test
Find the refresh rate of your screen in hertz in three seconds. It measures the frames your browser draws, so you can see if 60, 120 or 144 Hz is in use.
Mouse Test
Test your mouse in the browser: every button, double-click switches within 80 ms, the scroll wheel and an estimate of the polling rate.
Noise Generator
Play white, pink or brown noise in your browser, with a volume limit, fades in and out and a timer that stops it after set minutes. Not a medical device.
Reaction Time Test
Test your reaction time in five rounds with random waits of 1.5 to 5 seconds. See your average, best and slowest time against a commonly cited figure.
Screen Recorder
Record your screen, a window or a browser tab, with sound from the tab or your microphone, as WebM or MP4 where supported. Nothing is uploaded. Not for phones.
Screen Test
Check your monitor or phone screen full screen: even greys, gradient banding, text sharpness, near-black detail, gamma and viewing angle. Runs in your browser.
Speaker Test
Test your speakers or headphones: left and right channels, a 20 Hz to 20 kHz sweep, test tones and a phase check. The sound is made in your browser.
Tone Generator
Make a test tone from 1 Hz to 20 000 Hz in your browser: sine, square, sawtooth or triangle, a note such as A4 at 440 Hz, a sweep and a left or right balance.
Typing Speed Test
Measure your typing speed in 1, 2 or 5 minutes: gross and net words per minute, accuracy and every wrong letter marked. Texts in twelve languages.
Voice Recorder
Record voice in the browser with pause, a waveform and a timer. Play, rename and download each take as WebM or 16-bit WAV. Nothing is kept after you leave.
Webcam Test
Test your webcam in the browser: see the resolution it really delivers, the frame rate it measures and save a PNG snapshot. Nothing is uploaded.
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Recordings stay on your device unless you save them.