Online Audio File Analyzer
Read decoded audio properties and sample levels directly on your device.
Secure. Audio stays on your deviceReady.
Contents
Inspect decoded audio samples
The browser decodes your local file and measures every sample in each channel. Duration, sample rate and channel count describe the decoded audio, which can differ from a compressed file’s original encoding. Peak and RMS are reported in dBFS relative to a sample amplitude of one. RMS describes sample energy, not perceived loudness or LUFS.
Understand the clipping sample fraction
The fraction counts samples with an absolute amplitude of at least one. It can flag full-scale samples or overs, but it does not prove distortion or calculate intersample true peaks. A zero fraction cannot rule out clipping introduced earlier in recording. Supported formats depend on your browser; decoded audio stays in memory and is never uploaded.
Using the Audio File Inspector
Check an audio file's decoded duration, channels and signal levels without uploading it. Use it for a quick sample-level check before editing or sharing a recording.
Instructions
- Choose a local audio file and wait for the Loaded message.
- Read Duration, Decoded sample rate and Channels, then compare each channel's peak and RMS.
- Check the full-scale sample fraction. Choose another file to compare its results; no separate scan button is needed.
Understanding peak and RMS
A sine wave with a peak amplitude of one half has a peak near −6.02 dBFS and RMS near −9.03 dBFS. A silent channel shows −∞. RMS describes sample energy, not perceived loudness. The decoded sample rate can differ from the original file's encoding.
What to do if the file will not load
- Try a WAV export if the browser cannot decode the original format. A filename extension alone does not guarantee a valid file.
- Check the limits: 30 MB, 10 minutes, 8 channels and 30 million decoded samples. Larger multichannel files can exceed the sample limit first.
- If a result seems unusual, compare channels and listen to the original recording. Zero full-scale samples does not rule out earlier clipping.
The inspector reads decoded samples locally. It does not measure LUFS, true peaks between samples, or recording quality as a whole.
