Make quiet tracks and recordings louder by boosting the output level — free, private and instant in your browser.
Open the Audio Studio
Go to the DefyAudio Studio and upload your file.
Open the Levels tab
Switch to the Levels tab in the settings rail.
Raise Volume Boost
Increase the Volume Boost control above 100% to amplify the output level.
Export
Choose a format and download your louder track — processed locally, no upload.
Amplify output
Push the level above 100% to make a quiet file noticeably louder.
Fine control
Dial in exactly how much boost you need instead of a fixed step.
Or level instead
Need a consistent loudness? The Smart Volume Leveler in the AI tab targets a set level instead.
Common formats
Boost MP3, WAV, FLAC, OGG, M4A or AAC, then export to MP3, WAV, FLAC, OGG or AAC (.m4a).
A volume booster amplifies the output level of a track so a recording that's too quiet becomes comfortably loud. It's the quick fix for a faint voice memo, a quiet MP3, or an interview recorded too far from the mic. DefyAudio boosts the level right in your browser and lets you export the louder file.
If your goal is consistency across many files rather than raw loudness — so nothing is jarringly louder than the next — the Smart Volume Leveler in the AI tab brings the track to a target loudness (-14 to -20 dB) instead. For a single quiet file, the Volume Boost control is the simplest path.
Upload it to DefyAudio, open the Levels tab, raise the Volume Boost above 100%, and export the louder file — free, with no upload.
Boosting too far can clip loud peaks. Raise it until the quiet parts are comfortable but the loudest parts don't distort; for a consistent loudness, use the Smart Volume Leveler in the AI tab instead.
Yes — DefyAudio boosts MP3, WAV, FLAC and more, and you can export back to the format you need.
No — the boost runs in your browser, so your file stays on your device.