LOCAL AUDIO UTILITY
Merge ShadowPlay audio tracks into one
Game and mic recorded as separate tracks? Recommended for recordings up to about 500 MB — video untouched, nothing uploaded.
Files over 500 MB may run out of browser memory. Long recordings are safer to split first.
Files never leave your device — everything runs in your browser.
FAQ
Before you merge
Why does my recording have two audio tracks?
ShadowPlay/OBS «separate both tracks» records game and mic separately; most editors and players only play the first.
Is the video re-encoded?
No. The video stream is copied bit-for-bit; only audio is re-mixed.
How long does it take?
Roughly real-time ÷ 4 on a desktop; a 10-minute clip is usually under 3 minutes. For reliable browser memory use, recordings up to about 500 MB are recommended; split longer files first.
Is my recording uploaded?
No, everything runs locally.
MKV from OBS?
Yes, MKV input is supported; output is MP4.