FREE TOOL · ON YOUR DEVICE
Increase audio volume free
Your voice note, podcast or song is too quiet: boost it here. “Normalise” raises everything evenly up to the peak you choose, without distortion; “Boost volume” goes further and controls the peaks with a limiter.
- Free, no watermark
- Your audio never leaves your device
- Up to 10 files at once
- Add your audio
- Choose how
- Download
HOW TO USE IT
Three steps.
Add your audio
Drop or choose up to 10 MP3, WAV, M4A, OGG files or a video’s audio.
Choose how
Normalise to −0.1, −1 or −3 dB, or boost +3, +6, +10 or +15 dB. Save as MP3 or WAV.
Download
Download each file or all of them in a ZIP. You will see how many decibels were added.
NEXT STEP
Keep going with these tools
Boost volume: common questions
What is the difference between normalising and boosting?
Normalising applies a single gain to the whole audio until its loudest point reaches the chosen peak: no distortion, but if there is already a loud hit it will not go up much. Boosting adds the decibels you ask for and a limiter flattens the peaks that would go over.
Why −1 dB and not 0?
When saved as MP3 the peaks can grow a little; leaving 1 dB of headroom stops them clipping in some players.
Will the background noise get louder?
Yes: everything goes up evenly, noise included. If it bothers you, run the audio through “Remove noise” first.
Is my audio uploaded to a server?
No. The tool runs inside your browser: audio files are read and processed on your device and are not sent to Cocuyo or to any third party. The MP3 encoder is served from our own site. You can check it in your browser’s network tools: your file is not sent.
Is it really free?
Yes. You can try it before signing up; to download the result we ask for a free account, with no subscription. Your free account comes with 30 welcome uses; after that, each use costs 1 credit (top-ups from US$1), and they are unlimited with Basic or Pro. It never adds a watermark.
What are the limits?
Audio files up to 100 MB and 15 minutes that your browser can read. They are processed one at a time and the MP3 is made in the background so the tab stays responsive, even on a phone.
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WHEN YOU WANT TO CREATE
Create voices and narration with AI.
Cocuyo’s Studio brings 30+ AI models for image, video and voice together. You see the credit cost before generating, and credits never expire.