MP3 Normalize

MP3 Normalize online — free

Normalize audio loudness to target LUFS.

Video processing in the browser uses WebAssembly (ffmpeg.wasm) so files stay on your machine. Ideal for quick edits without cloud queues or account limits.

Use this free MP3 Normalize whenever you need a reliable result without creating an account or installing software. It loads in one click and works on desktop and mobile browsers.

Why use this tool?

Local ffmpeg.wasm
No upload to server
No sign-up

How it works

Open the MP3 Normalize page — no registration required.
Upload or drag your file into the drop zone.
Adjust settings and review the live preview (local ffmpeg.wasm).
Copy the output or download the processed file to your device.

Common use cases

Trim or compress clips before sharing in Slack or email
Convert a screen recording to a widely supported format
Quick edits when you cannot install desktop video software
Prototype a workflow before automating it elsewhere

Tips & comparisons

Compared with desktop apps, this online mp3 normalize starts instantly and needs no updates — bookmark it for repeat tasks.
Cloud upload services may store copies of your files; this browser tool keeps processing local when the feature allows it.
For batch or enterprise workflows, combine this tool with Tentaco studios or export results to your own pipeline.

Privacy & data handling

Tentaco runs this tool in your browser whenever possible. Files you select are processed in memory on your device and are not uploaded to Tentaco servers for standard modes. Close the tab or clear the page after use on shared computers. Features that call external APIs (such as URL fetchers) only send the data required for that request.

Frequently asked questions

What does this mp3 normalize tool do?

Normalize audio loudness to target LUFS. Open the tool in your browser — no account or install required.

Does it support Local ffmpeg.wasm?

Yes — local ffmpeg.wasm.

Is my data sent to a server?

No — processing runs locally in your browser. Your files and inputs do not leave your device unless the tool explicitly uses the network.