Why trim audio in the browser?
You have an MP3, a podcast episode, or a voice message and you want just a slice of it - a chorus for a ringtone, the best moment of a chat, an intro before the main segment. The classic path is installing Audacity or logging into some online service that uploads your file to their server. That is overkill, and sometimes a privacy concern.
This tool does it all in your browser. Your file never leaves your machine - not to us, not to any third party. You pick an audio file from disk, see the waveform, drag the start/end handles, listen to the slice, and download the result as a WAV file.
It works with whatever your browser can decode: MP3, WAV, OGG, M4A, AAC, FLAC, WebM. The decoding is done by the Web Audio API, the same engine used by Spotify Web and SoundCloud.
There is no hard file-size limit, but everything is loaded into your browser's RAM. Files up to 30-50 MB are smooth on any machine. Bigger files (a 2-hour podcast at high bitrate) may take a moment to load.
How to use it
- Drag an audio file onto the waveform area or click "Pick file" and select it from disk.
- Wait a moment while the browser decodes the audio - long files can take 2-5 seconds.
- Below the waveform you have two sliders: the left one sets the start, the right one sets the end. You can also type values directly into the Start and End number fields (in seconds, to two decimals).
- Click "Preview" to hear exactly the range you selected. If it is off, adjust and replay.
- For a smaller file (e.g. a short ringtone), enable "Mix down to mono" - the channels get averaged into one and the WAV becomes half the size.
- Click "Download WAV". The file is saved as `original-name-trim.wav`. You can drop it onto your phone, a video editor, or a website.
When this is useful
Typical situations where you need to grab a slice of audio quickly without firing up a pro editor:
- Phone ringtone. Pick a 15-second chorus of your favourite track, export, drop on the phone. Both iOS and Android accept WAV without conversion.
- Podcast intro. You have a 90-minute episode and want just the first 30 seconds as a teaser for social media.
- Voice message snippet. From a 5-minute voice message (family, client) you cut a specific moment to share onward.
- Audio for a video. You are preparing a backing track for a reel or a short - grab exactly as many seconds as the scene runs.
- Interview quote. You cut the strongest moment of a conversation into a standalone clip.
- Music sample. A couple of seconds from a track to use in your FL Studio, Ableton, or BandLab project.
- Language lesson. A single sentence pulled out of a song or film clip so you can replay it for pronunciation drill.
- Presentation material. A short jingle or audio quote dropped onto a slide.
After trimming you may also want to convert the file to another format - check the audio converter (if you prefer MP3 over WAV) or the video converter if it is going into a video.