Normalize Audio
Normalize Audio evens out a track's loudness to a consistent target and prevents clipping, using the broadcast-standard EBU R128 loudnorm filter. Pick a preset for streaming, podcasts or broadcast, and export audio that sits at the right level wherever it's played.
Add your audio file
The file is read by your browser and stays on your device — there is no upload step.
Your audio
The work runs in this tab. Nothing is sent anywhere, and the download is generated locally.
Output —Load audio
How to use Normalize Audio
- 01Upload
Add your audio
Drop your file in and play it to hear the current level.
- 02Customize
Choose a target
Pick Streaming (-14 LUFS), Podcast (-16) or Broadcast (-23) depending on where it will be used.
- 03Process
Normalize
Export to apply loudness normalization and download the result.
What normalising actually does
Normalising finds the loudest point and lifts everything by the same amount so that peak sits where you want it. The balance between quiet and loud passages is unchanged.
If your recording is quiet in some places and loud in others, normalising raises both equally and the unevenness remains. That needs level automation, not normalisation.
Where to aim
- Podcast / spoken word−16 LUFS
The widely used target for speech. Loud enough for headphones on a train, with headroom left before clipping.
- Music for streaming−14 LUFS
Roughly where the major platforms normalise to. Delivering louder than this achieves nothing — they turn it back down.
- Peak normalising−1 dBFS
The simpler approach: raise the highest peak to just below maximum. Leave a decibel of headroom so lossy encoding does not push it into clipping.
Signs you have pushed too far
Distortion on the loudest words — Peaks that exceed maximum are clipped flat, which is heard as a hard crackle. It cannot be removed afterwards.
The room comes up with the voice — Raising a quiet recording raises its hiss and air conditioning equally. A quiet clean take normalises well; a quiet noisy one gets louder and noisier.
It sounds louder but not clearer — Level is not intelligibility. If the problem is muddiness, an equaliser is the right tool.
This is baked into the export
The exported file contains the new levels. Anything clipped on the way is permanently flattened — turning it down afterwards does not restore the peaks.
Export to a new file. If the result is wrong, normalising a second time from the source is far better than trying to correct an already-normalised copy.
Supported formats
- MP3
- WAV
- M4A
- OGG
- FLAC
- Maximum file size —
- bounded by your device's memory
- Processed by —
- FFmpeg (WebAssembly), on your device
Your file, and what the page does
Your file is never uploaded. Normalize Audio reads it into this browser tab and processes it with FFmpeg compiled to WebAssembly on your own device. There is no upload endpoint in the application and no copy on any server — closing the tab discards it.
That is also why processing takes longer here than on a site that uploads: your device is doing the work rather than a rack of servers. The trade is that the file never leaves it.
What the page does send or fetch
- The processing engine, once
- The first time you use any video or audio tool, the browser downloads the FFmpeg WebAssembly build (~30MB) from the jsDelivr CDN and reuses the cached copy afterwards. That is a file coming to you — no part of your own file is in the request.
- Ads on the page
- The site is funded by advertising, so the page loads Google AdSense. That carries the usual web basics — IP address, browser, referring page — as on any ad-supported site.
- An anonymous usage counter
- When Normalize Audio finishes we record that the tool ran, whether it succeeded and how long it took. No file data, no identifier, no cookie.
Your file is not on that list. How this works.
Frequently asked questions
LUFS measures perceived loudness. Streaming platforms target around -14 LUFS, so normalizing to it keeps your audio consistent with them.
Yes — a true-peak ceiling is applied so the audio is brought to a consistent level without clipping.
Use Streaming for music platforms, Podcast for spoken word, and Broadcast for TV/radio standards.
Yes — Normalize Audio is completely free. There's no account, sign-up, watermark or limit.
No. It runs in any modern browser — Chrome, Edge, Safari, Firefox, Brave — with nothing to download or install.
Not sure normalising is what you need?
- The whole recording is too quietNormalize Audio
- You want a specific decibel changeAdjust Volume
- It is muddy or harsh rather than quietEqualizer
- Levels jump between merged sectionsMerge Audio
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