Audio Trim Tool

Your file is decoded to raw audio samples in the browser. When you set a start and end, the tool copies exactly the samples in that range — sample-accurate — into a new WAV file. Because it works on the decoded audio rather than re-compressing, the trimmed section is a clean, lossless copy at the original sample rate and channel count. Nothing is uploaded; the work happens entirely on your device. This in-browser audio cutter approach means no software to install and no file size limits imposed by a server.

The output is WAV (uncompressed PCM). If you started from an MP3 or M4A, the trimmed WAV will be larger than the equivalent slice of the source file, but it won’t lose any further quality — the lossy compression artefacts present in the original are preserved exactly, with no second-generation loss. For example, when you trim an MP3 here, the exported WAV faithfully captures the decoded audio of that slice without any re-encoding penalty. For MP3 output you would re-encode the WAV in a desktop editor such as Audacity. For a permanent archive copy at a smaller file size, load the WAV into the Audio Format Converter.

Common use cases include extracting a short audio clip or sample from a longer recording, cropping or cutting audio from the start or end of a file, and cutting out a specific spoken passage for use in a presentation or podcast. If instead of trimming you need to change the playback speed of an audio file, the Audio Speed Changer can export a varispeed WAV from 0.25× to 4×. For best results when setting cut points, aim for a moment of silence or a natural breath to minimise audible clicks at the boundary.