Volume Booster
Last updated: June 1, 2026In-browserMake audio louder or normalize it.
Volume Booster is a free online tool to make audio louder or normalize it. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Volume Booster
The Volume Booster makes quiet audio louder — up to 4x — or normalizes loudness for a consistent level across a clip. It's the fix for recordings that are too soft to hear. It runs privately in your browser with no upload and no watermark.
Read the full guide: How to Increase Audio Volume (Make It Louder, Free)
- 1Drop in your audio file.
- 2Increase the volume (up to 4x), lower it, or auto-normalize the loudness.
- 3Export and download the adjusted audio.
Up to 4x louder
Rescue quiet recordings by boosting the volume well beyond the original.
Normalize loudness
Even out a clip so the volume stays consistent from start to finish.
Private and free
Processed on your device with no upload and no watermark.
Boost a too-quiet voice memo
Recordings of lectures, interviews and phone-mic voice memos often come out too soft to hear on laptop speakers. Drop the file in and raise the gain to 2x, 3x or 4x to bring a faint voice up to a usable level, then download the louder MP3. For very quiet speech, try Auto-normalize first so the boost stays clean instead of clipping.
Make a quiet video's audio louder
If a clip you recorded has audio that's too low, feed the video file straight in. The tool extracts the soundtrack, drops the video, and lets you push the volume up to 4x, exporting just the boosted audio as an MP3. It's handy for salvaging a quiet talk or screen recording when you only need the louder sound, not the picture.
Even out loudness across podcast clips
When segments were recorded at different levels, listeners keep reaching for the volume knob. Run each clip through Auto-normalize to pull them all toward one consistent target loudness, so a quiet intro and a loud guest section sit at a similar level. It's a fast way to smooth out an episode or a batch of voice clips before you stitch or publish them.
Volume Booster — frequently asked questions
How do I make an audio file louder?
Drop it in, raise the gain (up to 4x), then export the louder file.
What does normalize do?
Normalizing adjusts the whole clip to a consistent target loudness, so quiet and loud parts are more even.
Will boosting cause distortion?
Very high boosts on already-loud audio can clip. Use normalize, or a moderate boost, for the cleanest result.
Is it free?
Yes — free, watermark-free and no account.
Is my audio uploaded?
No, the processing runs in your browser.
Share this tool
Send it to someone who needs it or save the link for later.
More audio tools
View allVoice Recorder
Record audio from your microphone.
Audio Joiner
Merge multiple audio files into one.
Audio to Text Transcription
Transcribe audio or video to text with AI.
Audio Converter
Convert audio to MP3, WAV, M4A, OGG or FLAC.
Audio Compressor
Reduce audio file size.
Audio Trimmer
Cut audio and make ringtones.