Audio Comparison
Compare two audio files by waveform and statistics
Drag audio here or click to upload
Supports MP3, WAV, OGG, WebM, AAC, FLAC, M4A
Drag audio here or click to upload
Supports MP3, WAV, OGG, WebM, AAC, FLAC, M4A
How to compare audio files
- Choose two recordings, up to 50 MB each. MP3 and WAV are good starting points; other formats depend on your browser’s decoder.
- Click Start Compare. For a quick demonstration, use Try sample audio first; it generates two files on your device.
- Check duration, align the recordings with the timing offset, and choose whether to normalize loudness.
- Use the heatmap to find changes, listen to both recordings, and export the JSON report or difference WAV if needed.
| What you see | What to check |
|---|---|
| A short section is different | Listen at that time for a cut, dropout or inserted silence. The sample demonstrates a change between 2 and 2.5 seconds. |
| Differences across the whole recording | Check the starting offset and loudness first. A shifted or re-encoded copy can have different waveform samples. |
| Same speaker, low similarity | Different words, timing, microphones and rooms change the signal. This tool compares recordings and cannot identify a speaker. |
| Two songs sound related | The score is a sampled signal comparison, not a melody match, music search or plagiarism determination. |
When recordings have different lengths, the heatmap and difference WAV include the longer ending; missing audio is compared with silence. The timeline starts at the original file’s zero, so a positive modified offset skips that file’s opening.
Audio is decoded locally. Long recordings can use much more memory than their compressed file size; compare a shorter excerpt if your browser runs out of memory. Read the audio comparison guide.
About Audio Diff
Compare two audio files online in the browser and review whether they match. MKDiff Audio Diff analyzes waveform shape, duration, loudness, peak level, clipping, silence, spectral energy changes, offset alignment, and high-difference time segments so reviewers can jump directly to the parts that changed.
Common Uses
- Compare voiceover, podcast, music, or sound-effect revisions before approval.
- Check exported audio against a source file after editing or conversion.
- Align files with small timing offsets before judging waveform or spectral differences.
- Find the time ranges where two audio files sound most different.
- Review waveform, spectral, loudness, peak, silence, and clipping changes without installing desktop software.
FAQ
Can I compare two MP3 files online?
Yes. Upload two MP3 files and MKDiff analyzes waveform, duration, loudness, sample rate, spectral differences, and similarity in your browser.
Can I compare two voice recordings?
Yes. MKDiff can compare voice recordings and show whether timing, loudness, waveform shape, and spectral energy are close or different.
What does Audio Diff compare?
It compares duration, waveform frames, loudness, peak volume, clipping, silence, spectral energy bands, offset alignment, and the strongest difference moments.
Can I jump to the changed audio segments?
Yes. The heatmap and difference segment list let you jump playback to the time ranges with the largest detected changes.
Can Audio Diff export the difference between two files?
Yes. After analysis you can export a difference WAV that subtracts the aligned modified audio from the original audio.
Are my audio files uploaded?
No. Audio Diff is designed for browser-side analysis, so selected audio files can be decoded and compared on your device.
Choose an audio comparison workflow
Start with the page that matches the files and result you need. Every workflow uses the same browser-side analysis engine.