Volume Booster By Soniclab.io

Volume Booster by SonicLab lets you make audio louder directly in your browser, with two convenient ways to boost sound.

Boost audio in your current tab: Increase the volume of compatible HTML5 audio and video from 100% up to 300%. It works with videos, music, podcasts, lectures, streams, and other supported web media. The extension uses the browser's Web Audio API with a limiter to provide real amplification while helping prevent excessive clipping.

Boost audio files: Select or drag and drop an audio file, preview the original and boosted versions, optionally normalize quiet recordings, and export the processed result as a WAV file.

Key features: • 100%–300% amplification in 5% steps • Quick presets: 100%, 125%, 150%, 200%, 250%, and 300% • Per-site volume levels • Automatic detection of dynamically added media • Audio file preview and A/B comparison • Optional audio normalization • 16-bit PCM WAV export • Processing happens locally on your device

No account is required, and the extension does not collect analytics or telemetry. Your audio files are processed locally and are not uploaded to a server.