Cutting a clip down to just the part you need — the highlight, the quote, the chorus — is one of the most common editing tasks, and it should not require uploading your whole file to a stranger's server. This tool trims a audio to any start and end point entirely in your browser.
The cut uses a stream copy, so it is instant and lossless — the kept audio is byte-for-byte the original, not a re-encoded copy.
The file is read, trimmed and saved inside your browser tab using ffmpeg compiled to WebAssembly. It is never uploaded, so trimming private recordings is completely safe.
No. The kept portion is copied directly from the source without re-encoding, so it is identical in quality to the original.
Fast stream-copy trimming can only cut at the nearest keyframe, so the start may land a fraction of a second earlier. This keeps trimming instant and lossless; for frame-exact cuts, convert the file first.