Video Volume Booster
Amplify your video's audio up to 10× louder — same format output, zero video quality loss.
Video & Downloader Tools
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How to Boost Your Video's Volume Online
Our free video volume booster amplifies your video's audio using a professional three-stage pipeline: raw gain amplification, dynamic range compression to prevent distortion, and EBU R128 loudness normalization for consistent perceived loudness. The result is a dramatically louder video with natural-sounding audio — not just raw volume cranked up.
Zero Video Quality Loss
Unlike other tools that re-encode your entire video, our tool uses -c:v copy to pass the video stream through completely untouched. Your resolution, frame rate, and visual bitrate are 100% preserved. Only the audio track is re-processed.
Same Format Output
MP4 in → MP4 out. MOV in → MOV out. MKV subtitle tracks are preserved. No container conversion, no compatibility headaches. The output file is ready to upload, share, or edit immediately.
Privacy-First Processing
Files under 400 MB are processed entirely in your browser using the Web Audio API — nothing is uploaded. Larger files are sent to our server, processed with server, streamed back to you, and deleted immediately. No storage, no logging.
Supported Formats
Works with MP4, MOV, MKV, WebM, AVI, M4V, FLV, WMV, TS and more. Audio is re-encoded at high bitrate (AAC 256 kbps, Opus 192 kbps, or MP3 320 kbps) depending on your container for the best quality-per-format result.
Who Is This Tool For?
Perfect for content creators fixing quiet screen recordings, students boosting lecture videos, journalists amplifying field recordings, and anyone who received a video that's too quiet to hear clearly. Choose from preset multipliers (1.5×, 2×, 3×, 4×, 5×) or enter a custom value up to 10×.