Mic Check Online
Mic Test
Mic check online in seconds. Detect your microphone, monitor real-time input levels, run an earphone mic test, and play back your recording instantly.
All tools free · No signup
Free online audio test.
Instant results.
Mic check, left right audio test, headphone test, stereo audio test, and Bluetooth latency - all free, all in your browser, zero friction.
Audio Tools
Free audio tools. Every device.
Left Right Audio Test
Speaker & Headphone Test
Stereo audio test for speakers, headphones, and earphones. Left right audio test, headphone check, pink noise lossless audio test, and playback audio test.
Bluetooth & System Delay
Latency Test
Audio latency test in milliseconds. Measure Bluetooth audio delay, AirPods lag, Zoom sync issues, and gaming latency — instantly in your browser.
Hearing Range & Age Test
Hearing Test
Online hearing test that estimates the highest frequency you can hear and your hearing age. Pure tone sweep using the Web Audio API — no download required.
Real-Time FFT Visualizer
Spectrum Analyzer
See every frequency your microphone picks up in real time. FFT spectrum visualization with peak hold, dominant frequency display, and musical note detection.
Browser Audio Recorder
Voice Recorder
Record, pause, trim, normalize, and download audio in your browser. Live waveform, level meter, quality analytics, and WAV download — no uploads, no account.
Mic Diagnostic Report
Microphone Quality Test
Speak for 10 seconds and get a full diagnostic: noise floor, signal-to-noise ratio, clipping count, dynamic range, and a quality score from 0–100 with personalized recommendations.
Tempo Finder
BPM Detector
Upload any MP3 or WAV and instantly detect the BPM of any song. Find the beats per minute for DJ mixing, music production, or workout playlists — no download required.
Musical Key Finder
Song Key Detector
Upload any audio file and find its musical key and scale. Get the Camelot code for harmonic DJ mixing. Supports MP3, WAV, OGG, and FLAC — fully browser-based.
DJ Analysis Tool
Key + BPM Detector
Get the musical key, Camelot code, and BPM of any song in one analysis. The fastest way to prepare tracks for harmonic mixing, sample matching, and DJ sets.
Why OnlineAudioTest
Built for clarity. Designed for speed.
Instant, no friction
No account. No download. No app store. One click and your test is running.
Focused tools only
No bloat. Every page does exactly one thing - with clear, honest feedback.
Private by default
Mic audio is processed entirely in your browser. Nothing is sent to any server.
Works everywhere
Mobile, tablet, desktop - every test is touch-friendly and fully responsive.
Free Online Audio Test — Everything You Need, Right in Your Browser
Whether you just plugged in a new pair of headphones, updated your audio drivers, or you're troubleshooting a video call where no one can hear you — a quick audio test is the fastest way to find out exactly what's working and what's not. OnlineAudioTest.com is a free, browser-based suite of audio diagnostic tools that gives you real answers in seconds. No download, no install, no account required.
Mic Check Online — Is Your Microphone Working?
The mic check is the most commonly needed audio test, and our mic check online tool handles every scenario. Whether you're using a built-in laptop microphone, a USB desk mic, a Bluetooth headset, or an earphone mic — simply click "Test My Microphone" and grant browser access. You'll immediately see a live waveform and input level meter respond to your voice, confirming the mic is being detected and the signal is strong enough for a call or recording session.
The earphone mic test works for any in-line mic — Apple EarPods, Android earphones, gaming headsets, and podcast microphones are all supported. A built-in playback feature records a short clip and lets you hear exactly how your voice sounds to others. This is the fastest way to catch echo, background noise, low gain, or distortion before your next Zoom call or recording session.
Left Right Audio Test — Stereo Channel Verification
A stereo audio test is essential whenever you set up new audio hardware or suspect a channel imbalance. Our left right audio test plays audio through each channel independently — left first, then right — so you instantly confirm whether both sides of your headphones, earphones, or speakers are producing sound at equal volume. If the left channel test plays audio from the right side, your stereo channels are swapped — a common issue after a driver reset or hardware reconnect that's easy to fix once identified.
The left and right audio test also works as a headphone check and earphone test left right. If one ear is completely silent, you've found a hardware fault in the driver or cable. Works equally well as a left right headphone test for over-ear cans, in-ear monitors, AirPods, and everyday earbuds.
Headphone Test — Music, Frequency, and Balance
Our speaker test doubles as a full headphone test with pink noise and sine tones sweeping bass, midrange, and high-frequency ranges. This headphone test music mode lets you hear real tonal differences between each driver — a darker or quieter ear reveals a degraded driver or a channel imbalance in your amplifier chain. The headphone check runs at any volume you set, making it suitable for quiet desk testing or normal listening-level evaluation.
The lossless audio test mode uses pink noise — a full-spectrum signal with equal energy per octave — to drive your headphone drivers across their entire rated frequency range simultaneously. This is faster and more revealing than a single-tone sine wave for spotting frequency holes, driver damage, or tonal imbalance between the left and right earpieces.
Audio Latency Test — Measure Bluetooth Delay
Audio latency is the gap between when a sound is generated and when you actually hear it. For wired headphones and speakers, this is typically under 10 ms and completely imperceptible. For Bluetooth audio, the delay varies dramatically by codec: SBC can introduce 100–200 ms of lag, while aptX Low Latency or LC3 (used in Bluetooth LE Audio) can bring it below 40 ms.
Our audio latency test measures your device's actual output delay in milliseconds. This Bluetooth audio test is essential for gamers experiencing lip-sync issues, musicians monitoring through wireless headphones, and video editors who need audio and video to stay precisely aligned. The AirPods test and general Bluetooth audio test give you a concrete latency figure so you know whether your wireless headphones are performing within normal range for their codec.
AirPods users can also run our dedicated AirPods Latency Test to compare expected latency across AirPods models and troubleshoot audio delay.
Privacy First — Your Audio Never Leaves Your Browser
Every audio test on this site processes data locally using browser-native APIs. Microphone audio is captured with the MediaRecorder API and is never transmitted to any server. Speaker, headphone, and latency tests generate all audio internally using the Web Audio API — no audio files are fetched from external sources, and no analytics software logs your results. Your tests are entirely private, from the first click to the last.
FAQ
Frequently asked questions
Why does my headphone audio keep cutting out?
Intermittent audio is usually a loose or damaged cable near the 3.5mm jack, low Bluetooth battery forcing a codec downgrade, or wireless interference. Plug your headphones into a different device first. For Bluetooth, move closer to the source, disconnect competing connections, and keep battery above 20%.
Why is audio only playing in one headphone?
Single-ear audio usually means a broken wire near the plug, a damaged driver on one side, or a balance setting shifted fully to one channel. Check System Settings → Sound → Balance first. Then run the left right audio test to confirm which channel is silent, and test on a second device to rule out software.
Why does my headphone audio sound muffled?
Muffled audio usually means a degraded tweeter/driver, a blocked ear pad, or an EQ preset cutting treble. Check your device EQ first. If no EQ is applied, run a headphone test with pink noise — if one ear sounds darker than the other, that driver is damaged. Dirty grilles on in-ear models are another common cause.
How do I test audio latency?
Open the Audio Latency Test — no microphone or extra hardware required. The tool measures your output delay in milliseconds using the Web Audio API. Wired connections typically show under 10 ms. Bluetooth ranges from ~40 ms (aptX Low Latency) to over 200 ms (SBC codec).
What is latency in audio?
Audio latency is the delay between when a sound is generated and when you actually hear it, measured in milliseconds (ms). It matters most in gaming, music production, and video calls — even a 100 ms delay causes noticeable lip-sync issues or makes real-time monitoring unusable.
What is low latency audio?
Low latency audio means a signal path with minimal delay — under 20 ms for professional use, under 40 ms for consumer listening. Wired audio achieves 5–10 ms. Bluetooth depends on the codec: SBC can exceed 200 ms, aptX Low Latency targets under 40 ms, and Bluetooth LE Audio (LC3) is designed for below 40 ms. Measure your exact delay with the Latency Test.
How do I check if my mic is working?
Open the Mic Check and click "Test My Microphone." Allow browser access. If the waveform and level meter respond to your voice, your mic is working. If nothing moves, verify the correct input device is selected in OS settings (Windows: Settings → Sound → Input; Mac: System Settings → Sound → Input) and no other app has exclusive mic access.
How do I do a left right audio test?
Open the Speaker Test and click "Left only" — you should hear sound only from your left speaker or left ear. Then "Right only." If audio plays from the wrong side, your channels are swapped. If one side is silent, that channel or driver is faulty. Works for headphones, earphones, AirPods, and desktop speakers.
What is a stereo audio test?
A stereo audio test verifies that the left and right channels of your audio output work independently and at equal volume. It plays audio through each channel in isolation to confirm correct stereo imaging, detect dead channels, and identify reversed wiring. Our stereo test includes sine tones and full-spectrum pink noise.
Why does my microphone have echo or sound distorted?
Echo means your speakers are feeding back into your open mic — wear headphones while recording to break that loop. Distortion means input gain is too high — lower the microphone sensitivity in OS settings (Windows: Recording Devices → Properties → Levels; Mac: System Settings → Sound → Input volume). Monitor your live signal with the Mic Test.
