The headphone test
your new pair deserves.
Eight quick, free tests — left/right channels, how high you can hear, bass depth, driver rattle, stereo imaging and 3D audio. Every tone generated live in your browser. No downloads, no samples, no tracking.
The tests, in order
Left / Right
The first thing to check: is left actually left? Catches swapped cables and reversed earbuds.
~10 seconds 02Channel balance
Is one side quieter? Find your perceived center and spot a weak driver or an off OS balance slider.
~20 seconds 03Frequency range
How high can you hear? A descending sweep from 20 kHz finds your limit — and your “hearing age”.
~40 seconds 04Bass extension
How low do your headphones go? Ride a sweep down toward 10 Hz and find where the bass gives out.
~30 seconds 05Driver rattle
The defect-catcher. A slow low-frequency sweep exposes buzzing, crackling, or a hair on the driver.
~30 seconds 06Stereo imaging
Can you place a sound at half-left? Test how precisely your pair renders the stereo field.
~30 seconds 07Binaural 3D audio
A sound orbits your head using HRTF spatial audio — the party trick that shows what headphones can do.
~30 seconds 08Phase / polarity
The subtle one. Hear the difference between in-phase and inverted audio and catch a miswired driver.
~20 secondsWhy this one?
Generated, not recorded
Every tone is synthesized live with the Web Audio API — sample-accurate, any frequency, zero compression artifacts from audio files.
Private by design
No account, no cookies, no analytics, no microphone access. Sound goes out of your headphones and nowhere else.
Any device
Phone, laptop, tablet — wired or Bluetooth. Each test notes how your connection can affect the result.
Questions people ask
Do I need to download or install anything?
No. Every test tone is generated live in your browser with the Web Audio API. Nothing is downloaded, uploaded, or tracked.
Are the test tones safe?
Start every test at a moderate volume. All audio passes through a limiter, and each test tells you when more volume is genuinely needed. If a tone is uncomfortable, turn it down — louder doesn’t make results more accurate.
Why are my results different over Bluetooth?
Bluetooth codecs compress audio and can alter frequency response slightly, and some earbuds apply their own EQ. For the cleanest results use a wired connection, or disable OS audio enhancements.
Is the frequency test a medical hearing test?
No — it’s a rough, fun indicator that depends on your headphones, volume and room. If you’re concerned about your hearing, see an audiologist for a calibrated audiogram.