Normalize
Brings the audio to a standard loudness level (the one podcasts and streaming platforms use). It raises what's quiet and lowers what's loud. The best option if you're not sure which to pick.
Audio tool
Change volume
Make a quiet recording easy to hear, or turn down audio that's too loud, without distortion.
Select your audio file
Level the volume automatically, or raise and lower it to your liking.
Your files are processed temporarily and deleted automatically.
01
Select
Upload your audio in any common format.
02
Choose the adjustment
Normalize works for almost everything.
03
Download
Same format, better volume.
Recordings that sound the way they should
A class recorded from the back of the room, a voice note recorded far from the phone, or an interview with a badly placed mic often end up so quiet you can't make them out even at full volume. On the other hand, some audio overloads the speakers. Change volume fixes both cases.
When raising the volume, a limiter keeps peaks from distorting, and the file is saved in the same format as the original, at high quality.
Which option should I choose?
Raise / Raise a lot
Raise loudness by up to 8 or 14 dB without exceeding a safe maximum, and a very quiet recording reaches at least a normal level. Peaks are controlled so it doesn't clip.
Lower / Lower a lot
Reduce the volume by 10 dB (it sounds half as loud) or 18 dB, for background music in videos or audio that clips.
Merge, then normalize
If you joined recordings with different volumes in Merge audio, normalizing the result helps everything sound more even.
How to change the volume
Upload your audio
Up to 150 MB and 2 hours.
Choose the adjustment
Start with Normalize; if it still sounds quiet, try Raise.
Download and listen
The file will have the original's name plus "-volumen".
What volume can't fix
Raising the volume also raises background noise, like air conditioning or traffic. If the recording is very noisy, it'll be easier to understand, but the noise will still be there.
Audio that was recorded distorted (clipped) can't be fixed by lowering the volume: the distortion is already part of the sound.
What happens to your files
Your audio is sent to our server only to adjust it. It's deleted as soon as the process ends, and the result is available through a private link that's deleted automatically shortly after.
Frequently asked questions about changing volume
Does it distort when I raise the volume?
No. A limiter controls the peaks so the sound doesn't break up, even with "Raise a lot".
Does the file format change?
No: an MP3 stays an MP3 and a WAV stays a WAV. Uncommon formats (WMA, AMR) are delivered as MP3.
Can I raise the volume of a video?
For now the tool works with audio. You can get the sound out with Video to MP3 and adjust it here.
Does it cost anything?
No. It's free with no sign-up. The site is supported by ads.