Make Audio Louder
Make Audio Louder boosts the volume of an audio file in your browser by a chosen number of dB, with a look-ahead limiter that holds peaks at -1 dBFS so it never clips.
At a glance
- Accepts
- MP3, M4A, AAC, WAV, FLAC, OGG and Opus audio, or the sound in a video file
- Outputs
- MP3 (192 kbps), WAV (16-bit) or M4A when the browser has an AAC encoder; the sample rate is kept where the format allows
- Where it runs
- Entirely in your browser, on your device
- What leaves your device
- Nothing - the file never leaves your device
- Limits
- Shows the clean boost available before clipping; big boosts also raise background noise; the limiter acts on sample peaks
- Account
- Not required - there is no sign-up
- Price
- Free, with no watermark and no usage cap
- Made by
- Visrut
- Last updated
- 13 October 2026
Turn up a recording that came out too quiet - a voice memo, a Zoom call, a phone video's sound - by as many decibels as you choose. Before you run it, it tells you how much louder it can get with no change to the sound, and if you go further, a peak limiter holds the loudest moments at -1 dBFS so nothing clips. It all happens in your browser.
How to use it
- Drop in an audio file (or a video, for its sound).
- Pick the boost in dB. The waveform previews the result and turns red where it would clip without the guard.
- Keep 'Limit peaks' to go as loud as you asked, or 'Stop before clipping' to cap the boost at the clean maximum.
- Choose MP3, M4A or WAV, press Make it louder, then listen and download.
Honest limits
- The limiter watches samples, not the waveform between them; true peaks can sit a fraction of a dB above -1 dBFS.
- A big boost also raises background hiss and hum by the same amount.
- Everything runs in your browser tab; the file is never uploaded.
- Long files are read and processed a piece at a time, so the length of the recording isn't the limit. The finished file is held in memory until you save it: about 86 MB per hour as MP3, and about 690 MB per hour of 48 kHz stereo as WAV, which a phone may not manage.
- MP3 and M4A are re-encoded at 192 kbps, which is a lossy step (like any edit to an MP3). WAV is uncompressed 16-bit.
- M4A is offered only when the browser has an AAC encoder (most desktop Chrome, Edge and Safari do; Firefox does not).
Sources (checked 13 October 2026)
Frequently asked questions
Will making it louder cause clipping or distortion?
Not with the peak guard on. Up to the clean boost shown, it is a plain volume change. Past that, a look-ahead limiter turns down only the moments that would go over -1 dBFS, a few milliseconds ahead of them, so no sample is clipped. Push it very far and the limiter works hard, which squashes the sound - the result card says how much it had to act.
What does 'clean boost available' mean?
How far the volume can go up before the loudest sample in the file reaches -1 dBFS. Choose 'Stop before clipping' and the boost never goes past that, so nothing about the sound changes except the volume.
Why stop at -1 dBFS rather than 0?
MP3 and AAC encoding can push peaks a little above the samples they were given. A decibel of room keeps the saved file from clipping when it is decoded. Spotify suggests the same -1 dB true-peak margin for lossy formats.
Should I use this or the Loudness Normalizer?
Use this when you just want it louder by a set amount. Use the Loudness Normalizer when it has to land on a platform's target, like -16 LUFS for a podcast: it measures the loudness and works out the boost for you.
Is my audio uploaded?
No. It is decoded, processed and encoded inside your browser tab.