Audio ToolsFree

Audio Volume Booster

Boost the volume of quiet audio files directly in your browser. Uses Web Audio API gain nodes to amplify the audio up to 4x (400%). Preview the boosted audio before downloading. Supports MP3 and WAV. No upload, no signup.

Drop your audio anywhere, click to browse

MP3, WAV, OGG, FLAC, AAC · Any format

Ctrl+Vto paste a copied file

Frequently Asked Questions

How much can I boost the audio volume?▼
Up to 4x (400%) gain. At 2x the volume is doubled; at 4x it is quadrupled. Be careful at very high values as they can cause audio clipping (distortion).
What is audio clipping and how do I avoid it?▼
Clipping occurs when the boosted audio exceeds the maximum digital level (0dBFS), causing distortion. Start with a 2x boost, preview the result, and increase gradually only if needed.
Can I preview the boosted audio before downloading?▼
Yes. Play the preview in the browser to hear the boosted version before saving it.
What formats are supported?▼
MP3 and WAV as input. The output maintains the same format as the input.
Why might my audio be quiet in the first place?▼
Quiet audio is common in recordings made with phone microphones, laptop microphones, or when the input gain was set too low. Boosting 1.5x-2x usually fixes most quiet recordings.