OnlineAudioTest.com is a free, browser-based audio diagnostic suite that runs microphone, speaker, headphone, and latency checks instantly without downloads or accounts.
What is OnlineAudioTest?
OnlineAudioTest.com is a collection of browser-based audio tools for testing microphones, speakers, headphones, Bluetooth latency, hearing range, and more. Each tool uses the Web Audio API and MediaRecorder API — no plugins, no uploads, and no server processing. The site is developed and maintained by an independent team focused on friction-free, privacy-first diagnostics.
Key Features
- Mic Check Online — Confirms microphone detection with a live waveform and level meter; supports built‑in mics, USB mics, Bluetooth headsets, and earphone inline mics. Includes playback to hear how your voice sounds.
- Left Right Audio Test — Plays audio independently through left and right channels to verify stereo balance, detect dead channels, or identify swapped wiring. Works for headphones, earphones, AirPods, and desktop speakers.
- Audio Latency Test — Measures output delay in milliseconds using the Web Audio API. Wired connections typically show under 10 ms; Bluetooth results range from ~40 ms (aptX Low Latency) to over 200 ms (SBC). No microphone required.
- Hearing Range & Age Test — Generates a pure‑tone sweep from low to high frequencies to estimate the highest pitch you can hear and your hearing age. No download or external hardware needed.
- Real‑Time FFT Spectrum Analyzer — Visualizes microphone input as a frequency spectrum with peak hold, dominant frequency display, and musical note detection. Runs entirely in the browser.
- Browser Audio Recorder — Records, pauses, trims, normalizes, and downloads audio as WAV. Includes live waveform, level meter, and quality analytics — all local, no uploads.
- Microphone Quality Diagnostic — Analyzes a 10‑second recording for noise floor, signal‑to‑noise ratio, clipping count, dynamic range, and outputs a 0–100 quality score with recommendations.
- BPM Detector & Key Finder — Upload MP3, WAV, OGG, or FLAC to detect tempo (BPM) and musical key (including Camelot code) for DJ mixing and music production.
Who is it for?
- Remote workers and video call users — Run a mic check and speaker test before Zoom or Teams meetings to confirm input levels and stereo output.
- Gamers and streamers — Use the latency test to measure Bluetooth headphone delay and the left right test to ensure headphone channels are balanced.
- Musicians and DJs — Upload tracks to the key and BPM detector for harmonic mixing, or use the spectrum analyzer to visualize live mic input.
- Audiophiles and headphone enthusiasts — Verify stereo imaging and driver balance with the left right audio test and pink noise lossless audio test.
What can you do with OnlineAudioTest?
- Troubleshoot audio hardware — Confirm a new microphone or headset is working, identify a dead earpiece, or detect Bluetooth codec latency before a gaming session.
- Optimize recording quality — Use the microphone quality test to get a noise floor and SNR reading, then adjust gain and placement based on personalized recommendations.
- Prepare DJ sets — Upload a track to the key detector and BPM detector simultaneously to get Camelot code and tempo in one analysis, all without leaving the browser.
- Check hearing sensitivity — Run the hearing range test to estimate the highest frequency you can hear and compare your result to typical hearing age ranges.
