Whether you're cutting a voice memo down to the useful part or grabbing a clip from a song, Audio Trimmer lets you set a start and end point by ear and export just that section, without installing anything or uploading your file anywhere.
Anything your browser can decode, which covers MP3, WAV, M4A, OGG, and most other common formats. If a file fails to load, it's likely an unusual codec your browser doesn't support decoding.
WAV is lossless and exact, but larger. MP3 is compressed and much smaller, which is usually fine for voice or casual listening. If you need the highest quality for further editing, use WAV.
No hard limit, but trimming happens entirely in your browser's memory, so very long files (an hour or more) may be slow or use a lot of memory on some devices.
No. Decoding, trimming, and exporting all happen locally in your browser. Nothing about your file is sent to a server.