Change Audio Volume
Processing entirely on your device — large files may take a moment.
Pick +50%, +100% or +200% and the samples are amplified with clipping protection — peaks that would overshoot are gently limited instead of crackling. For quieter output the filter scales everything down proportionally.
This is a straight multiplier — for making the whole track sit at a target loudness level, use the normalize tool instead.
How to change audio volume
- 1
Select your files
Drag & drop your MP3 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to MP3". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted MP3 file individually, or grab everything at once as a ZIP archive.
About the MP3 format
MP3 (MPEG-1 Audio Layer III) defined digital music: standardized in 1993, popularized by Napster and the first portable players, and freed of all patents in 2017. It is lossy psychoacoustic compression — it discards frequencies the ear supposedly won't miss — at bitrates from 128 to 320 kbps, with ID3 tags carrying title, artist and cover art.
Twenty years of competitors have failed to displace it, because playback support is absolute: every device that has ever played music plays MP3. At 320 kbps even critical listeners struggle to identify it in blind tests, though modern codecs reach the same quality at noticeably lower bitrates.
+Strengths
- ✓Plays on absolutely everything
- ✓Rich tag ecosystem (ID3, cover art)
- ✓320 kbps is transparent for most listeners
!Limitations
- −Lossy ceiling — never a mastering format
- −Less efficient than AAC/Opus at equal quality
- −Low-bitrate artifacts are audible and permanent
Frequently asked questions
Why does the boosted audio distort?
Boosting raises the peaks too; anything already near full scale clips. The limiter softens it, but a source recorded too hot cannot be fully fixed — normalize handles level mismatches better.
Is lowering volume lossless?
Mathematically yes for the samples — but MP3 output still re-encodes once. Use WAV/FLAC sources for a truly untouched pipeline.
Can I normalize instead of a fixed boost?
Yes — the normalize tool measures the loudness and targets broadcast standard automatically.