Trim, merge, or convert audio in the browser
How to use it
Choose conversion, trimming, merging, or extracting audio from video. Add the media, set the output, and wait for the browser to finish. The processing uses code in the page, including a local WebAssembly build for the heavy work. The media is not uploaded to NexTool. Large files depend on memory and can fail. Keep the original. Listen to the export before you replace anything. A trim that starts at the wrong second is still a successful encode. This page does not host a library of your recordings.
The file stays in this browser. NexTool does not upload it and does not keep a copy after you leave the page. Download the result and check it before you send it on. If the tab runs out of memory, the job stops and the original is still the one on your computer.