Change Volume
Make audio and videos louder or quieter in decibels, with protection against clipping.
Free · No upload · 100% on your device
Change Volume
Choose video or audio files, or drop them here.
MP4, MOV, MKV, WebM, AVI and more · No size or length limit. Nothing is uploaded.
100% on your device
How to use Change Volume
- Choose your audio files, or drop them on the page.
- Pick the settings in the side panel.
- Select “Change volume”. The first use downloads the video engine once.
- Download the result. Your original file is left unchanged.
Private by design. Your files are processed in this browser tab and are never uploaded to KittySuite.
About Change Volume
About 6 dB sounds roughly twice as loud. Prevent clipping keeps loud peaks from distorting after a boost. For consistent loudness between files, Normalise Loudness is usually the better choice.
Processing happens in this tab with FFmpeg compiled to WebAssembly; your recordings are never uploaded. The first video or audio tool you use downloads the 10 MB engine once and keeps it cached for next time. On phones, files are processed one at a time to stay within memory, and long recordings take a little longer. Keep the tab open until the download appears.
Change Volume: frequently asked questions
How do I make an audio file louder?
Choose the file and enter a change in decibels, such as +6. About 6 dB sounds roughly twice as loud.
Will boosting the volume distort the sound?
Leave “Prevent clipping” on; it keeps loud peaks from distorting after a boost.
Can I make it quieter?
Yes. Enter a negative value, such as −6 dB.
How do I make several files equally loud?
Use Normalise Loudness, which measures each file and sets it to the same loudness target.