MP3 Normalizer
Level Out Loudness Before Publishing or Scheduling Audio
Normalize MP3 loudness directly in your browser so your clips, ads, intros, and podcast segments sound more consistent across platforms.
Process one audio file from start to finish
Match perceived loudness so your audio feels more even and easier to publish.
No upload required. The file stays on your device while the tool runs.
Chrome and Edge generally perform best, especially for longer 1080p and 4K media.
Use it for quick cleanup and conversion before scheduling, looping, or publishing in Upstream.
Upload, tune, and export in one pass
Choose the source file
Drop in one audio file from your device. Supported formats: MP3, WAV, M4A, AAC.
Adjust the settings
Use the preset that matches the output you want, then compare the result before downloading it.
Run the tool
Large files can take a while, especially when the browser has to re-encode media before export.
Where this fits
These pages are built for one-shot media tasks, not full timeline editing.
Level out podcast or interview clips.
Normalize ads, promos, and prerecorded intros.
Make a set of audio assets feel more consistent before streaming.
Need more than a one-off tool?
Use Upstream Studio when you want to turn these finished assets into scheduled streams, looping channels, countdowns, or always-on live programming.
Explore Upstream Studio