Change Volume
Boost or reduce audio loudness by a decibel amount.
Positive dB makes it louder, negative dB makes it quieter.
Add audio
MP3, WAV, M4A, OGG, FLAC, OPUS — or a video to pull audio from.
Choose an output
Boost or reduce audio loudness by a decibel amount.
Fine-tune
Optional — sensible defaults are already set.
About Change Volume
Some recordings come out too quiet to hear on a phone speaker, while others are loud enough to distort earbuds. This tool applies a fixed gain change in decibels, from -20 dB to +20 dB, to the entire file and saves the result as an MP3.
When it helps
- Making a quiet lecture or Zoom recording audible without turning your device to maximum
- Turning down a track that is much louder than the rest of a playlist
- Boosting a voice memo recorded from across the room
Tips
- Every +6 dB roughly doubles the signal level; start with +3 to +6 dB and listen before going further.
- Large boosts on audio that is already loud will clip and sound harsh. If parts of the file are loud and others quiet, Normalize Audio usually gives a better result.
- A negative value such as -6 dB is a clean way to tame a track that distorts on cheap speakers.
Good to know
Quick answers about change volume in your browser.
Try +6 dB first. If it is still too quiet, go up in small steps and listen for crackling on the loudest parts, which means it is clipping.
Changing volume adds the same fixed amount of gain everywhere. Normalizing measures the file's loudness and adjusts it to hit a specific target, which is more consistent across different files.
Yes. There is no sign-up, no watermark and no limit on how many files you process.
No. Files are read and processed locally in your browser, so they never leave your device.
Related tools
Part of the Audio Editor collection.