Description

The first time you use this tool, you need to wait for FFmpeg.wasm to download and load.

This tool is built on FFmpeg.wasm, porting the industry-standard FFmpeg multimedia processing engine to the browser via WebAssembly technology. All audio processing operations are completed on your local device without uploading to any server, ensuring the privacy and security of your audio files.

The percentage is relative to the original volume. 50% is half, 150% is 1.5 times, and 200% is twice as loud. Custom accepts any value from 0% to 1000%. 0% is silence, and a high value may cause clipping.

Volume adjustment requires re-encoding. The export keeps the original audio format, and uses the original bitrate and channel count when available.