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FixVolumeLevel help
Make a video or audio file louder, quieter, or more even, in your browser.
What this does
Fixes the sound on a recording that came out too quiet, too loud, or all over the place. Drop the file in, set how you want it, and save a fixed copy.
Your original file is left alone. You get a new one alongside it.
How to use it
- Drag your video or audio file onto the page, or tap to pick one.
- Press play and drag the Volume slider. You hear the change straight away.
- If the quiet parts are still too quiet, tick Boost the quiet parts.
- Click Save fixed file, and the new version downloads.
What you hear while playing is exactly what gets saved, so you can set it by ear and trust the result.
Boost the quiet parts
Some recordings swing about: someone leans towards the microphone and it is loud, then leans back and you can barely hear them. You end up riding the volume knob the whole way through.
Tick this box and the tool goes through the recording, finds the stretches that are too quiet compared with the rest, and lifts just those. The loud parts are left where they are. The result is a recording you can play at one comfortable volume from start to finish.
It deliberately leaves the near-silence alone. Room tone, a fan, the hum between sentences: lifting those would just give you louder background noise, so it does not touch them.
- An interview or a talk where the speaker moves about: tick it.
- A recording that is simply quiet but otherwise even: leave it off and use the slider instead.
- Music you care about: leave it off. The loud and quiet parts are meant to be different.
Video quality is not affected
Only the sound is rebuilt. The picture is passed through untouched, exactly as it came in, so a video comes out as sharp as it went in no matter how many times you run it through.
It is also why saving a video is quick even when the video is long.
What you can put in
Video must be MP4 or MOV recorded as H.264, which covers most things: Zoom and Teams recordings, OBS, screen recordings from Windows and Mac, and most cameras.
Audio can be MP3, M4A, WAV, FLAC or OGG.
Video is saved as MP4 and audio is saved as MP3.
Which browser to use
Chrome or Edge are recommended. Other browsers may not be able to rebuild the sound.
Your privacy
Your file never leaves your device. Everything happens inside your browser, so nothing is uploaded and nothing is stored on a server.
Common questions
It says my video is not supported. Why?
Most likely it is an iPhone video recorded as HEVC, or a screen recording from a browser saved as WebM. Neither can be handled without rebuilding the picture, which would cost you quality. On an iPhone you can switch to Settings, Camera, Formats, Most Compatible to record the usual format from then on.
I turned it up a long way and it sounds squashed.
There is a limit built in that stops the sound distorting when it gets pushed too far, and past a point that limit starts flattening the loudest moments. Pull the slider back a little. If the recording is quiet all the way through, Boost the quiet parts usually sounds better than a big slider push.
Can I hear it before I save?
Yes, and you should. Press play and adjust as it runs. What you hear is what gets saved.
Why did my background noise get louder?
Boost the quiet parts lifts quiet speech, and anything sitting alongside it comes up too. If the hiss bothers you, turn the box off and use the slider on its own.
How big a file can it take?
Up to about 500 MB. Beyond that a browser tab tends to run out of memory. Keep the tab open and in front while a large one is running.
My video has two soundtracks. What happens?
Only the first one is used.
Does it work on a phone?
Yes, though a phone has less memory, so stick to shorter files.