Adjust Volume
Boost or reduce audio volume by a precise dB amount — no upload required.
100% in your browser — files never leave your device
Precise decibel-level volume control
Sometimes you have audio that is simply too quiet or too loud, and you want to apply a specific gain rather than target a loudness standard. A podcast recorded too quietly, a notification sound that is too jarring, a background music track that needs to sit under a voiceover — these are all fixed with a direct dB adjustment.
The tool applies FFmpeg's volume filter, which multiplies the audio samples by the linear equivalent of your dB value. The adjustment range is -20 to +20 dB. At +6 dB, amplitude doubles; at -6 dB, it halves. Boosts above the file's headroom will clip — to avoid this, normalize the file first.
Processing runs entirely in your browser with FFmpeg.wasm. No upload, no server, no account required.
Frequently asked questions
What does dB mean for volume?
+6 dB doubles the perceived loudness; -6 dB halves it. 0 dB means no change. +3 dB is a noticeable but moderate boost. Values above +10 dB risk digital clipping if the source is already close to full scale — use the normalize tool if you want loudness-safe adjustment.
Can boosting volume cause distortion?
Yes. If the audio waveform already has peaks near 0 dBFS, a positive gain will push those peaks over 0 dBFS, causing hard clipping and audible distortion. To boost safely, first run normalization to bring the loudness down to a comfortable level, then apply the volume boost.
Is my audio uploaded anywhere?
No. All processing runs in your browser using FFmpeg.wasm — a WebAssembly build of FFmpeg. The WASM binary (about 25 MB) downloads from a CDN on first use and is then cached. Your audio never leaves your device.
What is the difference between volume adjustment and normalization?
Volume adjustment applies a fixed dB gain to the entire file. Normalization measures the integrated loudness of the file and adjusts the gain to hit a target level (e.g., -16 LUFS). Use normalization when you want consistent loudness; use volume adjustment when you have a specific gain offset in mind.
Why does the first run take longer?
FFmpeg.wasm (about 25 MB) downloads on first use and is cached by your browser. After that, subsequent operations start immediately.