How to compare two audio files in a browser without uploading them

Use this workflow when two audio exports sound close but you need evidence before approving a podcast, voiceover, music cue, sound effect, or converted file.

A simple waveform view is not enough when one file starts a little later, was re-encoded, or has subtle EQ and loudness changes.

Start with duration, peak level, average loudness, and channel count. These metrics catch obvious export mistakes before you spend time listening through the whole file.

If the files have different start padding, use offset alignment before judging similarity. Otherwise a tiny timing shift can make the entire waveform look different.

Open Audio Diff and choose the original audio file and the revised audio file. After analysis, use Auto align if the files appear shifted by a small amount.

Check the heatmap for time ranges with the largest difference, then jump to those moments and A/B listen. If the heatmap is mostly quiet but the score is not perfect, inspect the spectral difference panel.

When you need to hear only the residual difference, export the difference WAV and listen to it separately.

A high similarity score with a small loudness delta usually means the files are close. A high spectral difference in the upper band can mean re-encoding artifacts, de-essing, EQ, or noise reduction.

A large duration delta usually matters more than a small peak difference. A strong difference at one short time range is often an edit, dropout, click, or inserted silence.