01
Add your audio or video
Drop a supported file into the tool or choose it from your computer. Common audio and video formats are supported.
Make quiet audio louder.
Without making it complicated.
Boost, normalize, trim, clean up and prepare audio or video files directly in your browser. Sound Booster is built for quick everyday fixes — with no account and no unnecessary setup.
Drop an audio file here
MP3, WAV, FLAC, AAC, M4A, OGG
MP3WAVFLACAACM4AOGG
MP4MOVWEBMMKVAVI
Gain+6.0 dB
Gain is calculated automatically in Normalize mode — switch to Boost to adjust it manually.
Original peak −3.5 dBNew peak −1.2 dB
0:000:00
Compare the original and boosted versions above. Click anywhere on the waveform to jump.
Local processing in your browser · No account · No upload required
Why Choose Sound Booster?
Fast, free, and private audio tools that work entirely in your browser.
Slowed + Reverb
Slow a track and add a dreamy reverb tail for the classic social edit.
Open tool →Audio Equalizer
Shape bass, mids and highs with multi-band EQ and genre presets.
Open tool →Audio Trimmer
Cut silence, intros or unwanted sections and keep only the part you need.
Open tool →Pitch Shifter
Raise or lower pitch for key changes, vocals, or creative edits.
Open tool →Speed Changer
Speed up or slow down a track — practice, podcasts, or social edits.
Open tool →Bass Booster
Add low-end weight with Warm, Deep or Extreme presets and live preview.
Open tool → Simple workflow
From quiet file to clearer audio in three steps.
No complicated editor. Choose a file, make the adjustment you need, then take the result with you.
02
Adjust the sound
Use Boost for direct control, or Normalize when you want the loudest part of the recording brought to a useful level automatically.
03
Preview and download
Listen to the result, choose an output format and save the processed file. The page is designed to keep the workflow short.
About the tool
What is Sound Booster?
Sound Booster is a free set of audio tools that run entirely in your browser. It is built for a simple everyday problem: the file you have is too quiet, uneven, or just not loud enough to use — and you do not want to install software or learn a full editor to fix it.
You can boost or normalize audio and video volume, preview the result, and download a louder file without creating an account. Soft clip is available when you need a stronger gain without the harsh edge of hard clipping. Everything is processed on your device, so your files stay private.
The Volume Booster is the main tool on this page. Around it we are building a small toolkit — equalizer, trimmer, normalizer, noise reduction — each focused on one job. The idea is not a studio DAW in the browser, but a place you open when you need a quick, clear fix and then move on.
A Chrome extension is also in the works, so the same kind of control can sit closer to the tabs and videos you already use every day.
When it helps
Who is Sound Booster for?
Anyone who regularly deals with quiet or uneven sound and does not want to fire up a heavy editor for a one-minute task.
Podcast and interview clips where one person is much quieter than the other. Screen recordings and tutorials with weak system audio. Old voice notes or phone videos that need a simple volume lift before you share them. Music or dialogue demos that sit too low next to other tracks. In all of these cases you often only need gain, a soft limiter, and a clean export — not a full project session.
Sound Booster is also useful when you are on a machine that is not yours, or when you simply prefer not to install desktop software. Open the page, drop the file, adjust, download, and close the tab.
Privacy first
Your files stay on your device.
Core volume processing is designed to run locally in the browser. That means the audio or video you drop into the tool does not need to be uploaded to our servers for the main boost and normalize workflow.
There is no required sign-up and no account wall in front of the tool. You can use it as a quick utility and leave without leaving a profile behind. We keep the product focused on practical fixes, not on collecting files or personal data.
Loudness tips
When should you normalize your audio?
A podcast with more than one speaker rarely has even volume. One guest sits too far from the mic and sounds quiet. Another leans in and almost clips the recording. The same thing happens in voiceovers: a loud line right after a near-whisper.
For the listener, that means constant volume fiddling. Soft parts disappear; loud parts jump out. Leveling the track fixes this — raise the quiet sections, gently hold back the peaks, and keep the whole file consistent from start to finish.
Normalize is built for that. Instead of guessing a gain value, it looks at the loudest peak and brings the whole recording up to a usable level without pushing it into hard clipping. Soft clip can still help if you need a bit more headroom without harsh distortion.
Use it for interviews, multi-guest shows, screen recordings with uneven system audio, or any clip where the dynamics feel uneven and you want one steady listening level.
Frequently Asked Questions
Straight answers about free use, privacy, formats, and how Boost and Normalize differ.
Is Sound Booster completely free?
Yes. The core tools on the website are free to use with no account, no subscription and no hidden limits on basic volume boosting. You can open the page, drop a file and process it without signing up or entering payment details.
Are my files kept private?
Yes. Processing is designed to run locally in your browser. Your files are not uploaded to an external server for the core volume tools, so the content stays on your device from start to finish.
Which file formats are supported?
Audio: MP3, WAV, FLAC, AAC, M4A and OGG. Video: MP4, MOV, WebM, MKV and similar formats the browser can decode. Support depends on what your browser can play natively.
What is the difference between Boost and Normalize?
Boost applies a fixed gain that you choose with the slider. Normalize analyzes the loudest peak and raises the whole file so that peak sits near a useful level without going over — useful when you just want the track louder overall.
Can I use the Video Booster?
Yes. Drop a video file and the picture plays back with the boosted (or original) sound in sync, so you can compare before committing. Download renders a boosted copy as a WebM file (VP9/VP8 + Opus) — the picture is kept, only the volume changes. Export runs in real time, so a 2-minute clip takes about 2 minutes to render.
Will boosting always sound clean?
Not always. If the original recording is already heavily limited or distorted, extra gain cannot restore lost detail. Soft clip helps stronger boosts sound less harsh, but it cannot fix a badly clipped source.