Volume Booster

Make an audio file louder or quieter without uploading it. Push a quiet recording up by up to 20 dB, normalize a track to a streaming, podcast or broadcast loudness target, and switch on a peak limiter when the boost is large. The FFmpeg filter chain runs in your browser, so your audio never leaves your device.

Add your audio

MP3 · WAV · M4A · OGG · FLAC

Drop audio here or click to browse

One track at a time, read locally on your device

MP3WAVM4AAACOGGFLACOPUS

Result

Add audio to start

Your adjusted audio will appear here

How to change the volume of an audio file

Add your audio

Drop one audio file into the tool, or click to browse. MP3, WAV, M4A, AAC, OGG, FLAC and Opus are all accepted, and the file is read locally in your browser.

Set the level

Stay on Boost by dB and drag the slider from -20 dB to +20 dB, or switch to Normalize loudness and pick a LUFS target. Turn on anti-clipping when the boost is large.

Adjust and download

Click Adjust volume, listen to the preview in the result card, then press Download to save the processed file.

Why use Aihangsoft Volume Booster

Up to 20 dB of gain

Move the slider in 0.5 dB steps to lift a faint interview or pull a loud backing track down, without opening a full audio editor.

Loudness targets that platforms expect

Normalize to -14, -16 or -23 LUFS using the EBU R128 standard, so an episode sits at the same level as everything around it.

Audio never leaves your device

The filters run in your browser through WebAssembly, so voice memos, interviews and client recordings are never uploaded or stored.

A level tool for real recordings

Boost or cut by decibels

Set any gain from -20 dB to +20 dB. Negative values make a track easier to talk over or tame a loud backing track, positive values lift a quiet recording that was captured too low.

Use case: voice memos, field recordings, quiet downloads

Loudness normalization (EBU R128)

The normalizer measures the perceived loudness of the whole file and corrects it to your target, holding true peak at -1.5 dBTP and loudness range at 11 LU. Streaming, podcast and broadcast targets are ready to pick.

Use case: podcasts, YouTube uploads, broadcast delivery

Optional peak limiter

Turn on anti-clipping and an alimiter stage caps peaks at 0.97 of full scale after the gain, which removes the crackle of clipped samples at the cost of slightly tighter dynamics.

Use case: large boosts, already hot masters

MP3, WAV and M4A output

The processed audio is re-encoded to the format you choose: WAV for editing or mastering, MP3 at 192 kbps for sharing, M4A for a smaller file at similar quality.

Use case: editing, sharing, archiving

Related tools

Audio Compressor

Smooth out the dynamic range

Audio Trimmer

Cut MP3 and trim audio

Audio Converter

Convert between MP3, WAV and M4A

Volume booster FAQ

Yes. The volume filter and the loudness normalizer are FFmpeg modules compiled to WebAssembly, so the whole job runs inside your browser tab. Your audio is never uploaded, never stored and never queued on a server. There is no sign-up, no per-file fee and no watermark, and the original file on your disk is left untouched.
The slider runs from -20 dB to +20 dB in 0.5 dB steps and the default boost is +6 dB. Every +6 dB roughly doubles the amplitude, so a quiet phone recording becomes clearly audible. Past about +6 dB the loudest peaks can run over 0 dB and clip into a harsh crackle, which is why the anti-clipping option exists and the tool warns you as you push the slider up.
Normalize loudness measures the average perceived level of the whole track and corrects it to a target you choose, following the EBU R128 and ITU-R BS.1770 standard that streaming platforms use. Pick Streaming (-14 LUFS) for Spotify and YouTube, Podcast (-16 LUFS) for spoken word, or Broadcast (-23 LUFS) for TV delivery. True peak is held at -1.5 dBTP and loudness range at 11 LU, so the result sits at a consistent level.
Turn it on whenever you boost by more than +6 dB or when the source already sounds loud. Anti-clipping adds an alimiter stage that holds peaks at 0.97 of full scale, which stops the crackle and distortion you get when samples run past zero. The trade-off is that a limiter slightly compresses the dynamics, so the loudest moments lose a little punch. For gentle boosts it is usually safe to leave it off.
No. Raising the gain multiplies the waveform that is already in the file, so quiet passages and background hiss come up together. Noise, muffled speech and clipped peaks that were captured that way stay that way, and amplifying a very quiet recording mainly makes the noise more obvious. Start from the best source you have and keep the boost as small as the track allows.
Yes. Any volume change has to be written into a new file, so the result is re-encoded in the format you pick, MP3 at 192 kbps, WAV or M4A. Quality depends on that choice rather than on the volume step itself. Choose WAV when you plan to edit or master the audio, and MP3 or M4A when you just want a smaller file to listen to or share.

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