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Audio Volume Adjuster

Adjust audio volume from -20dB to +20dB without re-encoding loss. Supports MP3/WAV/FLAC/AAC up to 100MB, processed locally in your browser.

How to Use

  1. Select an audio file to adjust volume
  2. Set the desired volume level using the slider
  3. Click the "Adjust Volume" button
  4. File will download automatically once finished

All processing is done in your browser, and files are never sent to a server.

Frequently Asked Questions

Yes, you can increase volume up to 200% of the original.
Increasing volume beyond 150% may cause audio distortion. It is recommended to stay below 150% for best quality.
The adjusted audio is saved in the same format as the input file.
If processing fails: (1) use a file under 100MB, (2) ensure the file is a supported format (MP3, WAV, AAC, FLAC), (3) refresh the page and retry.
No. All operations are processed entirely inside your browser's local sandbox using client-side APIs (like WebAssembly, pdf-lib, or HTML5 Canvas). Your files and data never leave your device.
The tool is completely free with no usage limits. However, since processing occurs in your browser's memory, we recommend keeping file sizes under 50MB (especially for heavy files like PDFs or videos) to ensure stability.
No. All tools on ConvertBox are 100% free. We do not insert watermarks, limit features, or require any registration or payment.
Yes. Once the page and its local library dependencies are loaded in your browser, the conversion logic runs completely offline without needing an active internet connection.

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