Here's how to fix a file that's too quiet, from a simple boost to matching loudness across several files.
1. Boost by dB
In Increase Volume, set a +dB value and apply it. +6 dB roughly doubles the signal's amplitude (which is not the same as sounding twice as loud). Push it too far and the sound distorts, so the tool limits it at the ceiling (0 dB).
2. Maximize
The "Maximize" button raises the whole file until the loudest moment sits at -1 dB. That makes it as loud as it can be without clipping.
3. Match loudness (LUFS)
If tracks or episodes play at different volumes, match them by loudness instead of by peak. The volume tool can match -14, -16, -19 or -23 LUFS with a -1 dBTP true-peak limit. -14 LUFS suits YouTube and music, -16 LUFS suits podcasts. To see the numbers before and after, use Loudness Meter (LUFS), and read What LUFS is and how to match it for details.
Good to know
- Background noise in the recording gets louder too. If it's noisy, run Noise Remover or Studio Sound first.
- A file that is already distorted stays distorted when you make it louder.
- If one loud cough or bump keeps "Maximize" from raising the level, LUFS matching with a limiter usually gets the rest of the file louder.
Sources and date checked
Checked: October 6, 2026
- Wikipedia, Decibel — https://en.wikipedia.org/wiki/Decibel
- ITU-R BS.1770, Algorithms to measure audio programme loudness and true-peak audio level — https://www.itu.int/rec/R-REC-BS.1770
This article is general information. Devices and services can change over time.
Frequently asked questions
How many dB should I add?
Start with +3 to +6 dB and listen. If you just want it as loud as possible without distortion, use Maximize, which sets the loudest peak to -1 dB.
Why does my audio crackle after boosting?
The peaks hit the 0 dB ceiling and clipped. Use a smaller boost, Maximize, or LUFS matching with a -1 dBTP limit instead.
What is the difference between Maximize and LUFS matching?
Maximize raises the file until its single loudest peak reaches -1 dB. LUFS matching sets the average perceived loudness to a target, so different files sound equally loud.
Is my file uploaded?
No. Volume changes are processed in your browser and nothing is sent to a server.