Make audio louder online in seconds, whether it is a quiet MP3, a song, a voice memo or a video soundtrack. Pick a loudness level and the booster raises the volume to match it, while a built-in limiter keeps the loudest peaks from distorting. That means one loud click or cough no longer limits how much you can amplify the rest. Use it as a free online sound booster and volume amplifier to raise, enhance or even out any recording, with nothing to install and nothing uploaded.
Why Is My Audio Too Quiet?
My recording is too quiet but boosting makes it distort
The limiter handles this. It turns down only the few peaks that would distort, so everything else can get louder. If the result sounds flat, choose a lower setting.
Background hiss gets louder when I increase volume
Boosting raises everything, including noise. For noisy recordings, open the file in the full editor and run Remove Noise before boosting.
My podcast is quieter than other shows on the same platform
Platforms compare loudness (LUFS), not peaks. Choose Normal (−16 LUFS, podcasts) or Loud (−14 LUFS, YouTube and Spotify) and the booster matches that level.
Make MP3s, Songs, Voice Memos and Videos Louder
Make an MP3 or song louder
A quiet download or an old rip? Choose Loud to bring it up to the level of songs on Spotify and YouTube.
Boost a quiet voice memo
Recorded too far from the phone? Normal with Boost quiet parts makes speech clear and steady.
Fix a quiet mic recording
Microphone gain set too low? Boost the recording afterwards instead of recording it again.
Make a video’s audio louder
Upload an MP4, MOV or WebM video and download its soundtrack, boosted, as MP3 or WAV.
Fix a low interview or lecture recording
Meeting, class and phone recordings are often quiet and uneven. Normal with Boost quiet parts makes every speaker easy to hear.
Boost a ringtone or notification sound
Alerts need to cut through noise. Max makes a short sound as loud as it can go without distortion.
How to Increase Audio Volume Online
- Upload an audio or video file: drop it on the page or tap Choose a file.
- Drag the Volume slider anywhere from 100% to 2000%, or tap an Auto level: Normal for voice, Loud for YouTube and Spotify level, or Max.
- Press Play and switch between Original and Louder to compare. For speech, turn on Boost quiet parts.
- Choose MP3 or WAV and tap Download louder audio.
How to Increase Volume Without Distortion
Every digital recording has a ceiling: 0 dB, the loudest level a file can hold. Turning the volume up moves the whole waveform toward it, and the loudest peaks get there first. What happens at that moment decides whether the louder MP3 sounds clean or crackles.
What clipping is and why boosted audio crackles
A plain volume boost multiplies every sample by the same amount. Anything pushed past 0 dB cannot be stored, so it is cut off flat. Those flattened peaks are clipping, and you hear them as crackling, buzzing or a harsh edge on loud words and drum hits.
Clipping starts long before audio sounds loud. Speech and music have short peaks 10 to 20 dB above their average level, so a single cough, a hard P or a snare hit reaches 0 dB while everything else is still quiet. That is why a simple amplifier usually runs out of room at 150 to 200%.
How a limiter prevents distortion
A limiter looks at the audio a few milliseconds ahead. When a peak is about to cross the ceiling, it turns the volume down smoothly for just that moment, then lets it back up. Everything below the ceiling passes through untouched, so the rest of the recording can keep getting louder.
The limiter in this volume booster looks 5 ms ahead and keeps peaks at −1 dB, including the peaks that can form between samples (true peak). It moves both stereo channels together, so the stereo image does not shift. The 1 dB of headroom leaves room for MP3 and AAC encoding, which can push peaks slightly higher on playback.
Plain gain vs a limiter
| Plain gain | Gain + limiter | |
|---|---|---|
| Loud peaks | Cut off flat at 0 dB (clipping) | Turned down smoothly for a few milliseconds |
| What you hear | Crackling, buzzing, harsh edges | Clean, denser sound |
| How far you can go | Until the loudest peak hits 0 dB | Up to 2000%; very high settings sound squashed rather than distorted |
| On this page | Prevent distortion off | Prevent distortion on (default) |
Increase volume without losing quality
The boost itself does not lower quality: the limiter only touches the peaks, and the rest of the audio is scaled exactly. What can cost quality:
- Saving as MP3 again. Every MP3 encode adds a little compression. Downloads here use 320 kbps, or choose WAV for no loss at all.
- Boosting noise. Hiss, hum and room noise get louder along with the voice. Run Remove Noise first.
- Pushing too far. Past about 600%, most audio is limited so hard that it sounds flat and tiring. Loud (−14 LUFS) is loud enough for almost everything.
- Distortion already in the recording. If the original clipped while it was recorded, boosting keeps that distortion. No volume tool can undo it.
Doing it in Audacity or Adobe Audition
Desktop editors do the same job in two steps. In Audacity, run Amplify with Allow clipping unticked, then the Limiter effect (both under Effect › Volume and Compression). In Adobe Audition, raise the level with Amplify or the Match Loudness panel, then catch the peaks with Hard Limiter (Effects › Amplitude and Compression). This page does both steps at once, in the browser, with nothing to install.
Peak vs LUFS: How Loud Should Audio Be?
Two numbers describe how loud a file is, and they answer different questions. Peak level tells you whether it will clip. Loudness, measured in LUFS, tells you how loud it sounds. A volume booster needs both.
Peak level: the loudest single moment
Peak level, in dB below full scale (dBFS), is the highest sample in the file, and 0 dB is the maximum. It decides whether audio clips, but says little about how loud it sounds: one door slam can put the peak at −1 dB while the voice around it is still quiet. That is why peak normalization often barely changes the volume.
Loudness (LUFS): how loud it sounds
LUFS (Loudness Units relative to Full Scale) averages the whole file, weighted the way hearing works: midrange counts more than deep bass, and silence and very quiet stretches are left out. Streaming services measure every upload in LUFS and turn loud tracks down, and some turn quiet ones up, so everything plays at a similar level. A change of 1 LU is the same size as 1 dB.
Peak vs LUFS at a glance
| Peak level | Loudness (LUFS) | |
|---|---|---|
| Measures | The single loudest sample | Average loudness as people hear it |
| Tells you | Whether the file will clip | How loud it sounds next to other audio |
| Used by | Peak normalization, limiters | Spotify, YouTube, Apple Music, podcast apps, TV |
| In this tool | The Peak reading; the limiter holds it at −1 dB | The Loudness reading and the Normal, Loud and Max levels |
Loudness targets for YouTube, Spotify and podcasts
- Spotify: −14 LUFS with its default volume setting
- YouTube: about −14 LUFS; louder videos are turned down
- Apple Music: −16 LUFS with Sound Check on
- Podcasts: −16 LUFS, Apple’s recommendation and the usual target for spoken word
- TV and radio: −23 LUFS in Europe (EBU R128) and −24 LKFS in the US (ATSC A/85)
The booster’s levels follow these targets: Normal is −16 LUFS for voice and podcasts, Loud is −14 LUFS for music and video, and Max is −10 LUFS for alarms, ringtones and anything that has to cut through noise. Going louder than a platform’s target rarely helps. The platform turns it back down, and the extra limiting stays in the file.
What the % on the Volume slider means
The slider shows the new level as a percentage of the original signal. Hearing works in decibels, so the steps are not even: about +10 dB sounds twice as loud.
| Volume | Change | Sounds |
|---|---|---|
| 200% | +6 dB | About 1.5 times as loud |
| 316% | +10 dB | About twice as loud |
| 1000% | +20 dB | About 4 times as loud |
| 2000% | +26 dB | About 6 times as loud |
Normal, Loud and Max set the slider for you by measuring the file, so a quiet voice memo might get 600% while a song that is already loud stays at 100%.
Volume Booster vs Normalize vs Compressor
Volume Booster
Raises loudness to a level you pick, with a limiter so peaks do not distort. Optional leveling evens out quiet and loud parts.
Best for: making quiet files louder in one stepNormalize
Raises the volume until the loudest peak reaches a target. Clean, but one loud spike limits how far it can go.
Best for: matching peak levels, careful editingCompressor
Reduces the gap between loud and quiet parts with full control over threshold, ratio, attack and release.
Best for: detailed control in the full editorNormal, Loud or Max: Which Loudness Level to Choose
| What you have | Setting | Why |
|---|---|---|
| Voice memo, lecture, interview | Normal + Boost quiet parts | Clear, steady speech at podcast level (−16 LUFS) |
| Song, music, video soundtrack | Loud | The level of YouTube and Spotify (−14 LUFS) |
| Alarm, ringtone, notification | Max | As loud as possible without distortion |
| You want it really loud | Drag to 600% or more | Up to 2000%; the limiter squashes peaks instead of distorting |
Tips for Boosting Audio Volume
- Start with Loud. If it sounds squashed or flat, step down to Normal.
- Switch between Original and Louder while it plays to hear the difference instantly.
- Boosting raises background hiss too. For noisy recordings, use Remove Noise in the full editor first.
- Downloads keep a little headroom below full scale, so MP3s will not clip when they are played back.
Myths About Making Audio Louder
Myth: Louder is always better
Reality: Past a point, making audio louder means squashing its dynamics, and it starts to sound flat and tiring. Streaming services turn very loud tracks down anyway, so Loud (−14 LUFS) is usually the sweet spot.
Myth: You can go above 0 dB without problems
Reality: Samples above 0 dBFS are clipped flat, creating harsh buzzing distortion. A limiter keeps peaks safely below 0 dB, which is why the booster uses one by default.
Fixes for Distorted, Noisy or Flat Boosted Audio
The audio sounds flat or squashed
The limiter is working hard. Choose Normal or drag the Volume slider lower, or turn off Boost quiet parts.
Background hiss got much louder
Boosting amplifies everything, including noise. Use Remove Noise in the full editor first, then boost the cleaned audio.
It is still not loud enough
Try Max, or turn on Boost quiet parts. Recordings with a whisper and a shout need leveling before they can sound loud.
Why Use This Audio Volume Booster
- Volume from 100% to 2000%, or one-tap Auto levels (Normal, Loud, Max)
- Prevent distortion: a built-in limiter keeps peaks clean, or switch it off for plain gain
- Loudness (LUFS), average RMS and peak readings for the original and the result
- Boost quiet parts to even out a quiet and a loud speaker with one switch
- Instant before and after preview while it plays
- No app to install. Works on phones and computers, and nothing is uploaded
Frequently Asked Questions
How do I make an MP3 louder?
Open the MP3 on this page, choose Loud, and tap Download louder audio. The booster raises the volume of the whole MP3 and the limiter keeps peaks from distorting. To increase MP3 volume by an exact amount, drag the Volume slider, for example to 300%.
How much louder can I make it?
Up to 2000% of the original level. 200% doubles the signal level (+6 dB), and around 300% sounds roughly twice as loud. At 600% and above most audio gets very loud and squashed: the limiter keeps it from distorting, but it sounds flatter and background noise rises too.
How do I make audio louder without distortion?
Use a limiter instead of plain gain. Plain gain pushes the loudest peaks past 0 dB, where they are cut flat and crackle. A limiter turns down only those peaks, a few milliseconds before they happen, so the rest of the audio can keep getting louder. On this page that is the Prevent distortion switch, and it is on by default: pick Normal, Loud or Max, or drag the Volume slider, and the peaks stay clean.
Why is my recording so quiet?
Usually the microphone was too far away, the input gain was set low, or the recording app left a lot of headroom to be safe. Phones also turn their own microphone down in loud places. Load the file here and choose Normal or Loud to bring it up to a normal listening level.
What do Normal, Loud and Max mean?
They are loudness targets, measured in LUFS the way streaming services measure loudness. Normal is −16 LUFS, the usual level for podcasts and audiobooks. Loud is −14 LUFS, the level YouTube and Spotify play at. Max is −10 LUFS, as loud as it reasonably gets.
Will boosting the volume cause distortion?
No. A built-in limiter turns down only the peaks that would go past the maximum level, a few milliseconds before they happen. At very high settings the sound gets denser and flatter instead of distorting. This is the Prevent distortion switch, on by default. If you want plain gain, switch it off; loud peaks then clip, and the Peak reading turns orange.
What is LUFS?
LUFS (Loudness Units relative to Full Scale) measures how loud audio sounds to people, not just how high its peaks go. It is defined in the ITU BS.1770 standard and used by Spotify, YouTube and Apple Podcasts to set playback volume. Two files with the same peak level can differ in loudness by 10 LU or more, which is why the booster aims at LUFS.
Why does my boosted audio sound distorted?
It is clipping. When a boost pushes samples past 0 dB, the tops of the waveform are cut flat and you hear crackling or buzzing. Keep Prevent distortion switched on so a limiter catches those peaks. If the original recording was already distorted, boosting cannot remove that.
What does Boost quiet parts do?
It turns quiet passages up and loud ones down automatically, like a sound engineer riding the fader, so a quiet and a loud speaker end up at a similar level. Pauses are not boosted, so background noise stays down. The waveform changes as you switch it on, so you can see the difference. Great for interviews, lectures and meetings; for music you usually want it off.
Can I make a video louder?
Yes, for the audio. Upload an MP4, MOV or WebM video and download its soundtrack boosted as MP3 or WAV. Saving the louder video file itself is not supported yet.
My microphone recording is too quiet. Can I fix it after recording?
Yes. Load the recording and choose Normal with Boost quiet parts turned on. Boosting cannot add detail the microphone did not capture, and background noise rises along with the voice.
Does it work on iPhone and Android?
Yes. It runs in Safari and Chrome on iPhone, iPad and Android phones, with nothing to install. Choose a file from your phone, and the louder file downloads to your Downloads folder (the Files app on iPhone).
Which file formats can I make louder?
MP3, WAV, M4A, AAC, FLAC, OGG and WebM audio, plus the soundtrack of MP4, MOV and WebM videos. The louder audio downloads as MP3 (320 kbps) or WAV.
Can I make audio quieter instead?
Not on this page: the volume booster only goes up, from 100% to 2000%. To turn a file down, open it in the full editor and use the Volume tool, which goes from −20 dB to +20 dB.
Can I make several files the same volume?
Boost them one at a time with the same level, for example Normal for every podcast episode. The levels are loudness targets, so each file lands at the same loudness no matter how quiet it started.
Does this make my phone or computer louder?
No. It makes the audio file itself louder, so it plays louder on any phone, speaker, car stereo or headphones. System volume booster apps change your device’s output instead.
Do I need Audacity or Premiere to boost volume?
No. Audacity, Premiere Pro and DaVinci Resolve can amplify and normalize audio, but this works in your browser with nothing to install, and does the loudness target and limiting in one step.
Will boosting an MP3 make the quality worse?
The boost itself does not degrade quality. Saving back to MP3 re-encodes the file, which adds a small amount of compression artifacts. Downloads use 320 kbps, or choose WAV for no loss at all.
Is it free, and are my files uploaded?
It is free with no sign-up, and your audio never leaves your device. All processing runs in your browser.