Normalize Audio Loudness
Loudness normalisation measures how loud the whole file sounds and adjusts it to a standard target, so your video is neither quieter nor louder than the ones around it.
- Nothing is uploaded
- Free, no sign-up, no watermark
- Works offline once loaded
Drop an audio or video file
or choose a file, or paste
MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC, WMA and more
Processed on your device. Nothing is uploaded.
How to use Change Video Volume
- 1
Add the file
Drop a video or an audio file on the drop zone.
- 2
Pick a mode
Choose Change by dB to make it louder or quieter by a set amount, or Normalise loudness to hit a standard level.
- 3
Set the amount
Move the Change slider (positive is louder), or pick a Target loudness such as -14 LUFS for YouTube.
- 4
Apply and download
Press Apply, listen to the result, then Download.
Why use Aback Video for this
Boost without clipping
A limiter catches peaks when you boost, so loud moments do not crackle.
Loudness normalisation
Two-stage EBU R128 measurement brings quiet and loud recordings to the same perceived level.
Video or audio
Works on the sound inside a video, keeping the picture untouched, or on audio files.
Private
Processing happens in your browser. Nothing is uploaded.
Frequently asked questions
What is LUFS?
Loudness Units relative to Full Scale, a measure of perceived loudness over time. Streaming services turn louder tracks down to their target, so matching it avoids surprises.
Which target should I use?
-14 LUFS for YouTube and Spotify, -16 for podcasts and Apple platforms, -23 for broadcast TV in Europe.
How many dB should I add?
6 dB sounds roughly one and a half times as loud, 10 dB about twice as loud. Start with 6 and increase if needed.
What is LUFS and which target should I use?
LUFS measures perceived loudness. YouTube and Spotify play at about -14 LUFS, Apple Podcasts suggests -16, and broadcast uses -23. Normalising to the platform's level keeps your video from sounding quieter than others.
Will boosting a very quiet recording make it sound good?
It will be louder, but background noise rises too. Run Reduce Background Noise first if hiss becomes obvious.
Is the picture re-encoded?
No. For videos, only the audio is processed and the video stream is copied.
Is my file uploaded?
No. The volume change is done by FFmpeg inside your browser.
Can I use this on a phone?
Yes. It is quick on phones because only the audio is processed.