Increase Video Volume
Make a quiet video or audio file louder without distortion. Boost it by a set amount or normalize it to a standard loudness. The video picture is copied untouched, and nothing is uploaded.
Your file never leaves your device. How?
Your media is processed in your browser and is not uploaded to our servers for conversion. Page assets (including the converter engine) still load over the network.
Select or drop a video or audio file
MP4, MOV, WebM, MKV, MP3, M4A, WAV and more. Video is copied without re-encoding.
Click, tap, or drop a fileHow to make a video louder
Choose the file
Drop or select a video (MP4, MOV, WebM, MKV) or an audio file (MP3, M4A, WAV).
Pick boost or normalize
Boost raises the volume by the amount you choose. Normalize brings it to a standard loudness.
Process
Only the audio is re-encoded; the video picture is copied as is.
Listen and download
Play the result in the page. If it's still quiet, run again with a bigger boost.
How the volume boost works
Boost multiplies the audio level by the number of decibels you choose: +6 dB sounds about one and a half times as loud and +10 dB about twice as loud. Simply amplifying makes the loudest moments clip and crackle, so a limiter holds peaks just below the maximum while the rest gets louder.
Normalize analyses loudness as it goes and adjusts it to about -16 LUFS, the level commonly recommended for podcasts. It makes quiet recordings louder and loud ones slightly quieter, which is handy for a batch of clips that should sound alike.
Features
No distortion
A limiter keeps peaks from clipping even at +20 dB.
Video untouched
The picture is copied without re-encoding, so only the sound changes.
Video or audio
Works with MP4, MOV, WebM and MKV videos, and MP3, M4A, WAV, FLAC and OGG audio.
Private
Recordings are processed on your device and never uploaded.
Frequently asked questions
Is my file uploaded?
No. Processing runs in your browser with a WebAssembly build of FFmpeg. Your file is read from your device and the result is saved back to it.
How much should I boost?
Start with +6 dB. Phone recordings of a distant speaker often need +10 to +15 dB. If a boost still sounds quiet, the recording probably has a few loud spikes; try Normalize.
Will making it louder cause distortion?
Not from clipping, because a limiter holds the peaks. But boosting also raises background noise, so a noisy recording will sound noisier.
What is the difference between Boost and Normalize?
Boost adds a fixed amount of gain. Normalize targets a standard loudness, so it can also turn a loud file down.
Does the video quality change?
No. The video stream is copied as is; only the audio is re-encoded.
How large a file can I use?
Videos up to 500 MB on a computer (250 MB on a phone). Audio files up to 4 GB on a computer.