Make Audio Louder Online

Upload your audio file to this tool, use the slider to increase volume by up to +20 dB, preview the result, and download. The entire process runs in your browser with no server upload.

The built-in hard limiter prevents clipping automatically. Peaks are clamped at 0 dBFS so your audio stays clean even at high boost levels. For extreme boosts (+15 dB or more), some compression of loud peaks is normal.

For most quiet voice recordings, +6 to +12 dB is enough. +6 dB doubles the perceived loudness. +12 dB quadruples it. Start with +6 and increase until it sounds right.

This tool decodes your MP3, adjusts the volume at the sample level, and exports as lossless WAV. The output is higher quality than the input because WAV has no compression. If you need MP3 output, you can convert the WAV afterward.

Yes. The slider goes from -20 dB (much quieter) to +20 dB (much louder). Use negative values to reduce volume on recordings that are too loud.

Yes. It works in any modern mobile browser. No app needed. Upload your file, adjust the volume, and download the result directly to your phone.

No limits. The tool processes your file locally in the browser, so it handles files of any size or duration that your device's memory can support.

Volume boost applies a fixed gain increase (e.g., +6 dB to everything). Normalization analyzes the loudest peak and raises the entire file so that peak hits a target level. Boost is simpler. Normalization is smarter for matching loudness across multiple files.