±20 dB · MP3/OGG/M4A/WAV · Free · No Upload
Increase Audio Volume Online — up to +20 dB Free
Increase volume of low recorded audio (or reduce clipping) directly in your browser. Free and private.
100% local processing: your file never leaves your device. Once the page loads, it even works offline.
Supported formats:Files .mp4 up to 300 MB — processed locally · Video and virtually any audio format are also accepted — we extract the audio automatically.
How it works
- 01
Upload the audio
Any common format, up to 300 MB.
- 02
Adjust the gain
From -20 dB to +20 dB. For low-recorded voice audio, +6 to +10 dB usually fixes it without distortion.
- 03
Download the corrected audio
The MP3 with the new volume is ready in seconds.
Frequently asked questions
Why convert to increase audio volume online?
Audio recorded too low? Increase the gain up to +20 dB directly in the browser and download the corrected file.
What if I need the text of this audio?
After converting, you can transcribe the file with AI on VoxScriber: 30 free minutes per month, with automatic punctuation and speaker identification. Ideal for WhatsApp audios, meetings, and interviews.
Is the Increase Audio Volume Online really free?
Yes, free and unlimited. The processing happens in YOUR browser (WebAssembly), so we have no server cost — and you don't need to create an account.
Is my file uploaded to any server?
No. All processing is local (FFmpeg compiled to WebAssembly running on the page). The file never leaves your device — it even works offline after the page loads.
Is there a size or quantity limit?
The limit is 300 MB per file (browser memory). There is no limit on number of uses. For larger files, VoxScriber processes on the server with uploads up to 5 GB.
Does it work on mobile?
Yes — any modern browser (Chrome, Safari, Firefox, Edge) on desktop or mobile. On older phones, large files may take longer.
Need the text of this audio? Transcribe with AI — 30 min free
Create free account →30 minutes/month free. No credit card required.