Normalize audio loudness to broadcast standards
Match exact streaming and podcast loudness requirements. Target -14 LUFS for YouTube or -16 LUFS for podcasts with transparent true peak limiting.
How it works
Choose your audio
Select any audio track or recording from your device.
Select loudness target
Pick YouTube (-14 LUFS), Podcast (-16 LUFS), or Broadcast (-23 LUFS).
Set output format
Choose your preferred output format and encoding bitrate.
The track is opened, not sent
Editing audio normally means uploading the file and hoping the service is trustworthy. Here your browser opens the track from your disk, works on it in place, and saves the result back. The audio never crosses the network.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so nothing is ever attached to an identity.
- No tracking of what you worked on or what was inside the file.
There is no queue, no render farm and no waiting room. The track is worked on in front of you and released the moment the tab closes. The how it works page covers what actually happens inside the tab, and our DevTools guide shows how to confirm 0 bytes are uploaded.
What people use it for
Sending a voice note that is too long
A ten-minute recording is a lot to ask someone to play. Trim it to the useful minute and it actually gets heard.
Fitting an episode inside a feed limit
Podcast hosts set a maximum size. Checking the result here saves a failed upload later.
Keeping a copy that will still open in ten years
A widely supported format is a safer long-term bet than a container only one app understands.
Formats & limits
What this tool accepts, what it produces, and what it will never ask you for.
- Input
- MP3, WAV, M4A, FLAC and OGG audio
- Output
- Set in the controls above
- Maximum file size
- Set by your device, not by a plan
- Files per run
- One at a time
- Sign-up required
- None
- Watermark
- Never added
- Works offline
- Yes, once the page has loaded
- Supported browsers
- Any current Chrome, Edge, Firefox or Safari
When something goes wrong
Corrupt files, and formats outside the list above, stop with a plain message rather than a spinner that never finishes. If a track plays in your music app it will normally open here.
The audio container is not one the browser can read. Convert it to MP3 or WAV first, then run it through again.
Why not an upload site
An upload-based audio editor sends your recording to a server and sends the result back. Removing that round trip removes the waiting, the caps and the copy of your file.
A typical upload site
This tool
Questions
What is LUFS loudness normalization?
LUFS measures perceived audio loudness over time. Normalizing ensures your audio plays at consistent volume across streaming platforms without distorting.
What target should I use for YouTube and Spotify?
-14 LUFS with a -1.0 dBTP true peak ceiling is the recommended standard for YouTube, Spotify, and modern streaming services.
Are my audio files uploaded anywhere?
No. The loudness analysis and volume adjustment run locally in your browser. Audio never leaves your computer.
Is there a file size limit?
No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.
Does it work without an internet connection?
Yes, once the page has loaded. Nothing is fetched while you work, so a dropped connection does not interrupt a run.
Do I need an account or an email address?
No. There is nothing to sign up for, and nothing is ever attached to an identity because no file leaves your device.