Audio File Inspector
Forensic-level audio file analysis — completely free, completely private
Our Audio Inspector examines every byte of your audio file and presents a comprehensive forensic report. From basic properties like bitrate and duration to deep analysis like spectrograms, stereo phase correlation, clipping detection, and metadata extraction — all processed entirely in your browser for maximum privacy.
What You Can Inspect
- Complete metadata extraction — ID3v1/v2, Vorbis Comments, FLAC tags, M4A atoms, WAV INFO chunks
- Technical audio analysis — peak, RMS, LUFS loudness, dynamic range, DC offset, clipping detection
- Frequency analysis — detailed spectrum, full spectrogram, dominant frequency detection, spectral cutoff analysis
- Stereo field analysis — L/R balance, phase correlation, stereo width, Lissajous visualization
- Forensic insights — encoder detection, lossy re-encoding detection, audio fingerprinting, embedded GPS/device info
How to Inspect an Audio File
- Upload or drag-and-drop any audio file (MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, WebM, Opus)
- Basic info, metadata, and tags appear instantly
- Expand sections for deep analysis — technical metrics, spectrogram, stereo field, forensics
- Export the full report as JSON for documentation or further analysis
Frequently Asked Questions
Is my audio file uploaded to a server?
No. All analysis happens entirely in your browser using the Web Audio API and raw binary parsing. Your files never leave your device.
What audio formats are supported?
MP3, WAV, FLAC, OGG, AAC, M4A, AIFF, WebM, Opus, and WMA. The inspector reads raw binary data, so even partially corrupted files may yield useful information.
Can it detect if an audio file was re-encoded?
Yes. The inspector analyzes the frequency spectrum for sharp cutoffs typical of lossy encoding. If a WAV or FLAC file shows a cutoff around 16-20 kHz, it was likely converted from a lossy source like MP3.
What is the audio fingerprint?
The inspector generates two SHA-256 hashes: one for the raw file bytes (file identity) and one for the decoded PCM audio data (audio fingerprint). The audio fingerprint stays the same even if metadata changes.
What does the spectrogram show?
The spectrogram is a time-frequency visualization showing how audio energy is distributed across frequencies over time. Bright areas indicate high energy. It reveals patterns invisible in a simple waveform view.
Why Use Our Audio Inspector
Whether you're a music producer checking masters, an audio forensics analyst examining evidence, a podcaster optimizing recordings, or just curious about what's inside your audio files — this inspector gives you the deepest possible look. No registration, no upload limits, no server processing, completely free.
