Before and after
The editor shows the original peak, calculated gain, and predicted peak before export.
Normalize audio online
to a −1 dBFS sample peak
Measure the decoded file's highest sample, calculate one linear gain adjustment, preview it, and export from the same browser-based audio graph.
Sample-peak measurementAutomatic −1 dBFS targetLocal processing
You can also drag and drop an audio file anywhere on this page.•Input compatibility depends on the browser decoder: MP3 and WAV; other formats depend on your browser
Peak normalization is a repeatable level adjustment
This tool finds the largest absolute decoded sample and applies the same gain ratio to every channel. It is useful for setting a predictable sample-peak ceiling, but it does not measure perceived loudness.
Channel balance
One multiplier is used for every channel, preserving the relationship between left and right.
Preview equals export
Playback and export use the same gain value in the shared processing graph.
Important limits
- This is sample-peak normalization, not LUFS loudness normalization or true-peak limiting.
- A file that already reaches 0 dBFS may already be clipped; lowering it cannot reconstruct flattened samples.
- The automatic gain is limited to 200%, so very quiet files may remain below −1 dBFS.
- Compressed export re-encodes the result and can introduce codec-dependent changes.
Useful for music, voice, and podcasts when the goal is a peak ceiling
- Bring a quiet recording closer to a consistent maximum without manual gain calculation.
- Reduce a hot file to leave a small sample-peak margin.
- Prepare clips for a later loudness workflow while keeping this step clearly separate from LUFS matching.
Normalization runs locally
The selected audio is decoded and processed in browser memory. It is not uploaded to the application server to calculate or export the normalized result. Site resources and consented analytics may still use network requests.