Private, browser-based microphone diagnostics
Microphone Test Online
Test whether your microphone works, which input is active, how strong the signal is, and whether there are obvious noise or response problems directly in your browser.
Microphone Diagnostic Lab
One input workflow for signal, level, headroom, playback and browser-reported settings.
Microphone access is needed only while you run the test. Audio is processed in this browser under our privacy and methodology rules; the test does not upload it. Privacy · Methodology
The PDF saves digital level and signal results, the selected input and browser settings, a quiet reference if taken, and signal snapshots when available. It does not include audio or certify microphone quality or room loudness.
Start the test when you are ready. Your browser prompts for microphone permission if it has not already been granted.
Record & Playback
Record up to 30 seconds, then hear clarity, noise, echo and processing that a meter cannot reveal.
Recording begins only when you press Record Sample and remains in browser memory until you discard it or leave this page. Privacy Policy
Quiet Room Reference
Stay silent for five seconds to check how much background signal reaches this input with its current settings.
This compares background input with your own speech. It does not measure calibrated room loudness in dBA or dB SPL.
This microphone checker shows digital input, not room loudness. Understand accuracy and limitations →
About this microphone test
Test your microphone directly in your browser before a call, meeting, stream or recording. See whether the correct input is active, watch your live level and waveform, check for clipping, and record a short sample so you can hear what the microphone actually captures.
Test Your Microphone Before It Matters
A permission prompt alone cannot show that your microphone works. This online microphone test checks whether your browser receives speech from the input you chose. The live meter shows its digital level; a short recording lets you hear the result. Technical readings then help you investigate quiet, noisy or distorted input.
Use it with a built-in laptop microphone, webcam mic, USB microphone, audio interface, gaming headset or Bluetooth headset. If you are testing a headset, check the input here and then use the Headphone Test or Speaker Test for the listening side.
What This Mic Test Checks
Use each check for one question. No reading here is a professional microphone quality score.
| Check | What it tells you | What it does not prove |
|---|---|---|
| Permission & input | Whether the browser can open an audio input and receive samples | That another app is using the same input |
| Live level | Whether speech is arriving quietly, actively or too close to digital clipping | Calibrated acoustic loudness in dB SPL |
| Waveform | Whether the signal is continuous and responds to speech | Studio-grade frequency response or noise performance |
| Peak & headroom | How close the captured digital signal is to 0 dBFS | The best gain setting for every app or codec |
| Record & playback | How the captured voice actually sounds in this browser path | How a later call app will encode or transmit it |
| Input details | What the browser reports about the active track | That every requested processing option was applied exactly as requested |
How to Test Your Microphone
Use your normal speaking distance and change one setting at a time so the result stays meaningful.
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01
Start the microphone
Press Start Microphone Test and choose Allow when your browser asks for microphone permission.
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02
Choose the intended input
Select the microphone you actually want to check if more than one input appears.
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03
Speak normally
Use the distance you would use in a call or recording. Watch the live level, peak and waveform respond.
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04
Check headroom
If the signal repeatedly reaches the digital ceiling, lower input gain or move slightly farther away. If it barely moves, check device, mute and gain controls.
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05
Record and listen
Play back a short sample and listen for clarity, background noise, crackle, room echo, aggressive processing or the wrong microphone position.
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06
Compare the quiet input
Run the Quiet Room Reference while staying silent to compare background input with normal speech.
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07
Release the device
Press Stop Test when you are finished so the browser releases the active input.
Understanding Microphone Levels
Look for a signal that responds to your voice and stays below the top of the meter. These are digital input readings, not room loudness.
- Microphone level
- How much digital audio the browser receives from the selected input.
- Signal strength
- How clearly your voice rises above the background input. A loud signal can still be noisy.
- Noise
- Unwanted sound or hiss captured with your voice, especially noticeable when you are silent.
- Frequency response
- How an input handles low and high sounds. This view can hint at an unusual balance but cannot measure the true response.
- Actual acoustic loudness
- Sound pressure in the room. It needs a calibrated sound-level method and cannot be read from this mic level.
What dBFS Means
Microphone level tells you how much digital audio the browser receives right now. The number uses dBFS: 0 dBFS is the highest digital level. Values below zero leave space for louder words. Signal strength means how clearly your voice rises above the background input; a high level alone does not mean a clean signal.
Actual acoustic loudness is sound pressure in the room; this mic test does not measure it. For an environmental sound estimate, use the Decibel Meter and read its accuracy limitations.
Input Level, Peak and Headroom
RMS is the typical level over a short moment. Peak is the loudest recent instant. Headroom is the space left before the digital limit. Gain is the input boost set by your device or system. Too much gain can cause clipping: loud parts hit the limit and may sound distorted. If peaks often reach the top, lower gain or move a little farther away.
Waveform and Frequency Spectrum
The waveform shows whether input continues, changes with speech or drops out. The frequency view shows which low and high parts of the captured sound have energy. An unusual response can hint at muffling or missing high frequencies, but this view cannot measure a microphone’s true frequency response or certify sound quality. Noise is unwanted sound or hiss you hear in playback or see during silence.
Record & Playback
A moving meter proves that audio is reaching the browser. It does not tell you whether your voice sounds clear. The microphone test recording gives you the listening check that a level bar cannot provide.
Record the same sentence you would say on a call, then play it back through headphones if possible. Listen for muffling, crackling, sudden gain changes, room echo, fan noise, keyboard noise and whether your voice sounds unusually distant or thin. Re-record after changing one setting at a time so you can hear what actually improved.
Microphone Permissions & Privacy
Microphone access never begins automatically. Press Start Microphone Test; if permission has not already been granted, the browser asks you to allow access. Once allowed, the page receives the selected audio stream for local analysis until you stop the test, close the page or the browser ends the stream.
A recording is created only after you explicitly press Record Sample. The sample stays in local browser memory and is discarded when you replace it, press Discard Sample or leave the page. This test does not upload microphone audio.
Read the Privacy PolicyDevice/Input Selection
Some browsers hide device names until microphone permission has been granted. That privacy behavior can make an input selector appear generic before the first successful test.
After permission, choose the built-in, USB, webcam, headset or interface input you intend to use. The Browser Input Details panel shows the settings the active track actually reports. If a value is unavailable, the tool says “Not reported” instead of guessing.
See the measurement methodologyBrowser Processing Can Change What Your Mic Sounds Like
Browsers and operating systems can apply echo cancellation, noise suppression and automatic gain control, especially for call-oriented inputs. These features can be useful, but they can also change tone, dynamics and background noise.
- Echo cancellation
- Reduces speaker sound being re-captured. It may also make a voice sound more processed.
- Noise suppression
- Software that tries to reduce background sound. It can also make quiet words sound unnatural.
- Auto gain control (AGC)
- Automatically turns the input up or down. Sudden changes can make the room noise rise and fall.
- Sample rate & channels
- Sample rate is how often sound is captured each second. Channels describe separate input paths, such as left and right. Neither number proves sound quality.
- Input routing
- Which microphone or interface channel is sent to the browser and to each side of a recording. A wrong route can leave one side silent.
Quiet Room Reference
Stay silent for a short reference window and let the tool summarize the relative digital input reaching the browser. This can help reveal constant fan noise, electrical hiss, background conversation, keyboard noise or automatic gain control that boosts background noise when you are not speaking.
Compare this background signal with your speech on the same input and settings. It is a relative digital reference, not actual acoustic loudness. Room loudness uses calibrated sound pressure units such as dBA or dB SPL.
How to Interpret Results
A result is a clue about the browser input path, not a complete diagnosis of the microphone or room.
| What you see | What it usually means | What to do |
|---|---|---|
| Meter stays near silence | No input, wrong device, muted mic, blocked permission or very low gain | Check permission, device selection, hardware mute and OS input gain |
| Speech moves the meter clearly | The browser is receiving a changing microphone signal | Continue to record/playback for the clarity check |
| Peaks repeatedly approach 0 dBFS | Very little digital headroom; loud words may clip | Lower input gain or increase distance |
| Clipping indicator appears | Samples are reaching or effectively hitting the digital ceiling | Reduce gain and re-test |
| High level while you are silent | Background noise, strong automatic gain, nearby noise or an unintended input | Run the quiet-room check and verify the device |
| Level jumps or drops while speaking steadily | Unstable input, automatic level changes or a loose connection | Listen to a recording, check the cable and compare browser processing settings |
| Only one side has sound in playback | A channel or input-routing problem may be present | Check interface channel selection and test the same mic in the target app |
| Voice sounds unusually thin or muffled | Input position, processing or an unusual frequency balance may be involved | Compare playback with another input and review the frequency view |
Common Microphone Problems
Use the observed result to choose the next check instead of replacing hardware first.
Nothing moves after permission
The wrong input may be selected, the microphone may be muted, operating-system access may be blocked, or the device may be disconnected. Choose another input, check OS privacy settings and reconnect the device.
Voice is very quiet
Input gain may be low, the microphone may be too far away, or the wrong mic may be selected. Move closer, raise system or interface gain and verify the device.
Voice distorts on loud words
The signal may be clipping before or at browser capture. Lower hardware or system gain, or increase the distance from the microphone.
Voice sounds distant
A built-in or webcam microphone may be selected instead of the intended headset or USB microphone. Check the input label and switch devices.
Voice sounds muffled or robotic
Noise suppression, echo cancellation, automatic gain, Bluetooth voice mode, a poor connection or the wrong microphone can alter the sound. Compare another device or wired path if available.
Constant hiss or fan noise
Room noise, analog noise, strong automatic gain or microphone placement may be raising the input floor. Run the Quiet Room Reference and reduce nearby noise or gain.
Sound comes through one side only
An interface or recording app may be routing one microphone channel to only the left or right side. Input routing means which device channel is sent to each recorded channel. Check channel settings on the interface and in the app you plan to use.
Troubleshooting
Microphone not working? Use this order.
- Check browser permission for this site.
- Confirm the intended microphone is selected.
- Check any physical mute switch, headset mute button or laptop microphone key.
- Check operating-system microphone privacy access and input level.
- Reconnect USB or Bluetooth devices and wait for the system to detect them.
- Close another app that may be holding or changing the microphone path.
- Reload the page and start the microphone again.
- If this page works, troubleshoot the specific call or recording app rather than the hardware first.
What This Test Can and Cannot Tell You
This page checks the browser and device microphone path. It cannot certify quality, calibrated sensitivity, studio performance, or medical or hearing function. Read Accuracy & Limitations, Validation, and the Disclaimer.
Useful practical diagnostics
- Confirm that the browser receives a microphone signal
- Show relative digital level, peak, headroom and clipping behavior
- Expose useful settings reported by the active browser track
- Let you hear a private local playback sample
Not laboratory certification
- Certify microphone quality, calibrated sensitivity, studio performance or professional frequency response
- Measure calibrated sound pressure in dBA or dB SPL
- Assess medical or hearing function
- Predict network-call quality or every application’s processing
- Replace an end-to-end test inside the target app
Related Audio Tools
Test the microphone input here, then use the dedicated tool for the next part of the audio path.
Frequently Asked Questions
Clear answers about microphone testing, playback, permissions and browser input levels. Read about accuracy and limitations, or see the measurement methodology.
How do I test my microphone online?
Press Start Microphone Test, allow access when your browser asks, choose the input you want to check, and speak normally. If the live level and waveform respond, the browser is receiving your microphone. Record and play back a short sample to check clarity.
Is this mic test free?
Yes. The microphone test is designed to run directly in the browser without an account or software download.
Is my microphone audio uploaded?
No. The test analyzes the microphone locally in the browser. A sample is created only when you press Record Sample and remains in local browser memory until you discard it or leave the page. Read the Privacy Policy.
Why does the browser ask for microphone permission?
Browsers require explicit permission before a website can receive microphone input. A permission prompt appears after you start the test if permission has not already been granted. Read the Privacy Policy.
Why is my microphone not showing up?
The device may be disconnected, blocked by operating-system privacy settings, unavailable to the browser, or hidden until permission is granted. Reconnect the device, review microphone access, then restart the test.
Why is my microphone name missing?
Browsers can hide device labels for privacy until microphone access has been granted. After permission, the browser may reveal more descriptive input names, although some devices can still appear with generic labels.
What does dBFS mean on the microphone meter?
dBFS is a digital signal scale. 0 dBFS is the digital ceiling, so normal microphone readings appear as negative values. It is not the same as acoustic dB SPL and should not be used as a sound-pressure measurement.
How do I know if my microphone is clipping?
If loud words repeatedly push the signal to the digital ceiling or the clipping indicator appears, reduce input gain or move slightly farther from the microphone. Re-record a sample and listen for distortion.
Why is my mic very quiet?
The wrong input may be selected, system or interface gain may be low, the microphone may be too far away, or a hardware mute or level control may be active. Check the device first, then adjust gain or distance.
Why does my microphone sound muffled or robotic?
Noise suppression, echo cancellation, automatic gain, Bluetooth voice mode, a poor connection or the wrong microphone can alter the sound. Check the browser input details and compare another device or wired path if available.
Can I record my microphone and hear it back?
Yes. A microphone test recording is one of the most useful checks because it lets you hear clarity, background noise, crackle, echo and processing that a live meter cannot show.
What is a playback mic test?
A playback mic test records a short microphone sample and then plays it back so you can hear the captured signal. It is different from live speaker monitoring and is less likely to create acoustic feedback.
Can I test a headset microphone?
Yes. Select the headset microphone after permission is granted. To check both parts of your headset, test the microphone input here and then use the Headphone Test to verify playback.
Why does my Bluetooth headset sound worse when the mic is active?
Some Bluetooth devices switch to a two-way voice profile when the microphone is opened. That can reduce playback bandwidth or change how the microphone sounds. Compare another input or a wired or USB connection if quality matters.
Why does my mic work here but not in Zoom, Teams, Meet or Discord?
If this page receives a signal, the browser input path is working. The other app may be using a different microphone, permission, mute state or processing setting. Check that app’s audio settings and select the same input.
Does this test measure microphone quality?
It can reveal practical problems such as silence, low level, clipping, background noise and obvious playback artifacts. It does not replace laboratory measurements of microphone sensitivity, self-noise or frequency response.
Can this test measure room noise in decibels?
The Quiet Room Reference can show the relative digital level reaching the browser, but it is not calibrated dBA or dB SPL. Use the Decibel Meter for environmental sound estimates and read its calibration limitations.
Does the microphone test work on phones?
Modern mobile browsers can request microphone access, but behavior and reported settings vary by device and browser. Allow microphone permission when prompted and keep the page active while testing.
Why does the waveform move when I am silent?
Microphones always capture some combination of room noise, device noise and processing. Fans, air conditioning, electrical noise and automatic gain can keep the waveform active even when you are not speaking.
Should I enable echo cancellation, noise suppression and auto gain?
For calls, those features can be useful. For a more natural recording check, less processing may reveal the microphone and room more directly. The important part is to show what the browser actually reports and compare playback, rather than assuming one setting is always best.