OnlineAudioTest

OnlineAudioTest.com is a free, browser-based suite of audio diagnostic tools that helps users test, measure, and troubleshoot audio hardware in seconds. No downloads, installs, or accounts are required — everything runs natively in the browser using Web Audio API and MediaRecorder API.

The platform includes a comprehensive set of tools:

• Mic Check Online — Instantly detect your microphone, monitor live input levels, run an earphone mic test, and play back recordings to catch echo, noise, low gain, or distortion before your next call or session.
• Left Right Audio Test — A stereo channel verification tool that plays audio through each channel independently so you can confirm both sides of headphones, earphones, or speakers are producing sound at equal volume. Detects swapped channels and hardware faults.
• Headphone Test — Includes pink noise and sine tone sweeps across bass, midrange, and high-frequency ranges to reveal driver degradation, tonal imbalance, or frequency holes.
• Audio Latency Test — Measures output delay in milliseconds for wired and Bluetooth audio. Critical for gamers, musicians, video editors, and call participants. Includes a dedicated AirPods latency test comparing expected delay across AirPods models.
• Hearing Test — Estimates the highest frequency you can hear and calculates your hearing age using pure tone sweeps via the Web Audio API.
• Spectrum Analyzer — Real-time FFT visualization with peak hold, dominant frequency display, and musical note detection.
• Voice Recorder — Record, pause, trim, normalize, and download audio directly in the browser. Live waveform, level meter, and quality analytics included — no uploads required.
• Microphone Quality Test — A full diagnostic report after 10 seconds of speech covering noise floor, signal-to-noise ratio, clipping count, dynamic range, and a 0–100 quality score with personalized recommendations.
• BPM Detector — Upload any MP3 or WAV to instantly detect beats per minute for DJ mixing, music production, or workout playlists.
• Song Key Detector — Upload audio files (MP3, WAV, OGG, FLAC) to find the musical key, scale, and Camelot code for harmonic DJ mixing.
• DJ Analysis Tool — Combined key, Camelot code, and BPM detection in a single analysis for fast DJ set preparation.

Target audience: Remote workers troubleshooting video calls, podcasters and content creators, DJs and music producers, gamers evaluating wireless headphone latency, audiophiles testing new hardware, and anyone needing quick audio diagnostics.

Core value proposition: Immediate, private, zero-friction audio testing. All microphone and audio processing happens locally in the browser — nothing is sent to any server. Fully responsive and touch-friendly across mobile, tablet, and desktop devices.