How to make audio or video louder
- Drop an audio or video file on the box. The loudness and peak level are measured first.
- Choose "Change volume" and set the dB, or choose "Normalize loudness" and a target such as -14 LUFS.
- Keep the limiter on to avoid clipping. The panel shows the expected loudness and peak after the change.
- Press the button, check the result in the player, and download it.
Loudness is measured as integrated loudness following ITU-R BS.1770 (K-weighting with gating), the same method used by broadcast and streaming standards.
Questions
Is my file uploaded?
No. Loudness is measured and changed inside this browser tab. Your audio or video never leaves your device.
Will boosting the volume cause distortion?
Boosting a track whose peaks are already near the maximum would cut them off. The limiter turns the volume down for a few milliseconds around those peaks instead, so loud sounds stay clean. You can turn it off, but then peaks above 0 dBFS will distort.
What is LUFS and why -14?
LUFS measures how loud audio seems to people, not just how high its peaks are. Streaming services such as Spotify and YouTube play music at about -14 LUFS, and podcasts are usually delivered at -16. Normalizing to the same target keeps files at a similar volume.
Is the video quality changed?
No. For a video file only the sound is processed. The picture is copied into the new file unchanged, so it finishes quickly and keeps full quality.
How much louder can I make it?
You can add up to 30 dB. Every 6 dB doubles the signal level, and about 10 dB sounds twice as loud. Very quiet recordings also have background noise, which gets louder too.
Credits
Built on Mediabunny (MPL-2.0), LAME MP3 encoder (via @mediabunny/mp3-encoder) (LGPL-2.0) and FFmpeg AAC encoder (via @mediabunny/aac-encoder) (LGPL-2.1-or-later). OneTooling is not affiliated with these projects.