Select File
or drag and drop files here
Adjust audio channels and sample rate
How to Resample Video Audio
Upload a video file (MP4, WebM, MOV, AVI, or MKV)
Select channel count — Mono for speech and podcasts, Stereo to preserve spatial audio
Select sample rate — 44100Hz for general use, 48000Hz for professional video
Click Process and download your converted MP4
Common reasons to resample video audio
- Convert stereo audio to mono to reduce file size for podcast or speech content
- Fix audio sync issues caused by mismatched sample rates in a video editor
- Prepare a video for broadcast delivery that requires 48000Hz audio
- Convert multi-channel audio down to stereo for web compatibility
- Normalize audio configuration before uploading to a platform with strict requirements
Key Features
Mono and Stereo Output
Convert stereo audio to mono to halve audio file size and ensure consistent playback on single-speaker devices. Or upmix mono audio to stereo for platform compatibility.
Sample Rate Conversion
Convert between 44100Hz (CD standard, general use) and 48000Hz (professional video standard). Mismatched sample rates cause playback issues in some editors and broadcast workflows.
Broad Input Support
Accepts MP4, WebM, MOV, AVI, and MKV. Output is always clean MP4.
No Upload Required
All processing happens locally in your browser. Your video never leaves your device.
Complete Privacy
Video files are processed entirely in your browser. No data is uploaded to any server at any point.
Frequently Asked Questions
When should I use mono vs stereo?
Use mono for speech, interviews, podcasts, and voiceovers — single-channel audio is smaller and plays identically on all devices. Use stereo when the audio contains spatial information, music, or ambient sound where left/right separation matters.
What sample rate should I choose?
44100Hz is the CD standard and works for general web and consumer use. 48000Hz is the standard for professional video production, broadcast, and most video editing software. If your video will go into an NLE like Premiere or DaVinci Resolve, 48000Hz is the safer choice.
Will this affect video quality?
No. Only the audio track is resampled. The video track is passed through unchanged.
Is there a file size limit?
The tool enforces a 500MB limit.
Which browsers are supported?
Chrome 94+ and Edge 94+ are fully supported. Chrome is recommended for best performance.