Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop your stereo file
JAD splits into left and right mono tracks
Download both as a ZIP
0 bytes uploaded. Stereo to Mono Splitter runs entirely in your browser using FFmpeg.wasm 8.1, RNNoise, and the Web Audio API. Your audio stays on your device at all times. No data is sent to any server — critical for sensitive interviews and confidential calls.
Dual-mic interviews often record host on left and guest on right. Splitting lets you process each voice independently before merging back.
Duplicate or pseudo-stereo-widen a mono recording into a stereo file. Useful for embedding mono voice into stereo masters.
Open toolSplit a long audio file into multiple parts by fixed duration, manual timestamp markers, or automatic silence detection. Each part downloads as its own file.
Open toolSmooth out loud and quiet passages so voices sit consistently in the mix. Broadcast-style compression with adjustable threshold, ratio, attack, and release.
Open tool