Simple Online Tools
Audio & Converter Utility • 100% In-Browser Privacy

Audio File Analyzer & Inspector

Inspect waveforms, real-time frequency spectrums, estimated BPM, fundamental pitch, peak & RMS volume levels, dynamic range, and codec metadata directly in your browser.

100% Private

Zero file uploads

Live Web Audio

Real-time FFT & meters

Lossless & MP3

WAV, FLAC, M4A, OGG

Instant Demo

1-click synth samples

Choose or Drag & Drop an Audio File

Supports MP3, WAV, FLAC, OGG, M4A, AAC, WebM, and AIFF • 100% Client-Side Privacy

Don't have a file ready? Test instant synthesizer samples:
Step-by-Step Guide

How Audio File Analysis Works

Our analyzer processes raw audio samples locally with zero external network transmission.

1

Upload or Synthesize

Drag and drop your audio recording, or test immediately using one of our built-in synthetic audio presets (EDM Beat, Acoustic Chords, Speech, Sine Sweep).

2

In-Browser Decoding & FFT

The Web Audio API decodes the compressed bitstream into raw 32-bit floating-point PCM audio buffers. Autocorrelation and Fourier Transform algorithms extract frequency bins, BPM, and peak dynamics.

3

Inspect, Zoom & Export

Zoom into milliseconds of the waveform, scrub during real-time playback, monitor live bass/mid/treble power meters, verify clipping safety, and copy diagnostic summaries.

Understanding Deep Audio Engineering Metrics

Essential knowledge for musicians, mastering engineers, podcasters, and sound designers.

Sample Rate & Nyquist

The sample rate (e.g. 44.1 kHz, 48 kHz, 96 kHz) defines how many snapshots of sound are captured per second. By the Nyquist-Shannon theorem, an audio file can faithfully reproduce frequencies up to half its sample rate (22.05 kHz for CD audio).

Peak vs. RMS vs. Crest

Peak dBFS measures the highest instant voltage in digital audio, while RMS dBFS reflects average acoustic energy. The difference between peak and RMS is the Dynamic Range (Crest Factor) — higher values mean lively, uncompressed dynamics.

Clipping & Headroom

When waveforms hit 0 dBFS, inter-sample peaks cause digital clipping and audible squared-off distortion. Professional mastering standards (EBU R128 / ITU-R BS.1770) recommend leaving at least -1.0 dBFS of true peak headroom.

Bitrate & Lossy Codecs

Uncompressed 16-bit 44.1kHz stereo audio transfers at 1,411 kbps. Lossy codecs (MP3 at 320 kbps, AAC at 256 kbps) use psychoacoustic masking to discard inaudible frequencies, reducing file size by 80–90% with minimal perceived quality loss.

Audio Health Scoring & Diagnostic Matrix

How our automated analyzer evaluates audio health and identifies common mix issues.

Health StatusScore RangeDynamic RangeTrue PeakRecommended Action
Mastering Grade / Excellent90 – 100> 10 dB≤ -0.5 dBFSReady for distribution and streaming platforms.
Good Quality Mix75 – 897 – 10 dB≤ -0.1 dBFSSolid mix; minor limiter adjustments may improve punch.
Over-Compressed / Fair50 – 74< 6 dB> -0.1 dBFSHeavy limiting; consider easing limiter threshold to restore dynamics.
Digital Clipping / Poor< 50Any0.0 dBFS (Clipped)Lower master fader or reduce input gain to eliminate distortion.

Supported Audio Formats & Containers

Decoded directly via browser hardware acceleration without server uploads

MP3WAVFLACM4AAACOGG VorbisOpusWebM AudioAIFF
Help & FAQ

Frequently Asked Questions

Everything you need to know about browser-based audio file analysis and metrics.

QIs my audio file uploaded to an external server during analysis?▼
No. All audio decoding, waveform extraction, Fourier transform (FFT) spectrum calculations, volume metering, and BPM detection run 100% locally in your browser via the Web Audio API. Your audio files and recordings never leave your device.
QWhat audio formats and codecs can I analyze with this tool?▼
The analyzer supports all audio formats natively decodable by modern web browsers, including MP3, WAV (PCM 16-bit, 24-bit, 32-bit float), FLAC (lossless), AAC / M4A, OGG Vorbis, Opus, WebM Audio, and AIFF.
QWhat is the difference between Peak Volume and RMS Volume?▼
Peak Volume represents the highest instantaneous digital amplitude reached by any single sample in the audio (measured in dBFS). RMS (Root Mean Square) volume calculates the continuous average power of the waveform over time, which correlates directly with perceived loudness by the human ear. The difference between Peak and RMS is known as the Dynamic Range (Crest Factor).
QWhat does digital clipping mean and why is it dangerous for audio quality?▼
Digital clipping occurs when an audio signal exceeds maximum allowable full scale (0 dBFS / 1.0 linear amplitude), causing the tops of waveforms to be truncated flat. This introduces harsh harmonic distortion and audible buzzing. Our analyzer counts saturated samples to flag clipping risks instantly.
QHow does the in-browser BPM and pitch detector work?▼
The tool extracts an acoustic energy envelope across low-frequency sub-bands, computes onset spectral fluxes, and performs autocorrelation across the 50–200 BPM tempo range to detect rhythmic pulses. Fundamental pitch is calculated using autocorrelation and FFT bin peak interpolation mapped to standard musical notes (A4 = 440 Hz).
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