Audio Trimmer
Upload an audio file and cut it down to just the part you need. Runs entirely in your browser — the file is never uploaded to a server. Downloads as a WAV file.
Click to upload or drag and drop
MP3, WAV, OGG, or other common audio formats
How it works
Your audio file is decoded into raw audio samples using the Web Audio API, then the samples between your chosen start and end points are copied into a new file and re-encoded as WAV. Nothing is uploaded — decoding, trimming, and encoding all happen in your browser.
Why the output is always WAV
WAV is an uncompressed format that's straightforward to generate reliably in a browser without extra dependencies. If you need MP3 specifically, most audio and video editing tools can convert a WAV file afterward.
Frequently asked questions
Why does the trimmed file download as WAV even if I uploaded an MP3?
The browser decodes any audio format it supports into raw samples, but re-encoding directly back to a compressed format like MP3 needs a dedicated encoder library. WAV is uncompressed and can be generated reliably without one, so that's what this tool outputs.
Is there a file size limit?
There's no hard-coded limit, but very long audio files use more of your browser's memory since the whole file is decoded and processed locally rather than on a server.