Upload the file, enter a start and end time, and download the trimmed result.
Need to record a clip first? Capture one with the voice recorder.
Audio Trimmer
Trim an audio file down to the time range you need, right in your browser. Upload the file, enter a start and end time, and download the trimmed result.
Key features
Key features of Audio Trimmer: load a clip in the browser, set start and end points, and download the trimmed result locally - the file stays on your device with no account required.
- Set a start and end time, then download just that section as a new file.
- Trimming does not re-encode, so the original quality and format are kept.
- The file is processed in this browser tab and is never uploaded to a server.
How the trim runs, and what it costs the first time
Audio Trimmer runs on FFmpeg.wasm, a build of FFmpeg compiled to run inside the browser tab. The first time you use it in a session, the browser downloads about 31MB of that engine from this site, not a third-party CDN, so the very first trim takes a little longer while that loads. Every trim after that, in the same tab, reuses the already-loaded engine and starts right away without downloading it again. While a trim is running, a status line above the output area updates in real time - loading the engine, reading your file, running the trim, then "Done" - so you can tell it is working rather than stuck.
Typing the start and end time
The Start and End fields under the upload box each accept either a plain number of seconds, such as "90", or a clock format, such as "1:30" for one minute thirty seconds or "1:02:03" for one hour two minutes three seconds. Leaving End blank trims from your Start point straight through to the end of the file. If you type an End time that is not after the Start time, Audio Trimmer stops and shows an error instead of producing a broken clip.
Frequently Asked Questions
What does Audio Trimmer do?
Trim a audio to the time range you need, right in the browser.
When should I reach for audio trimmer?
Trimming does not re-encode - the original quality and format are kept.
What complementary tools work well alongside audio trimmer?
For converting to a different format instead, see the related-tools section.
Need a different format?
To convert the clip to another format instead of trimming it, use the related tools listed below.
What time formats can I type into Start and End?
Either works: a plain number of seconds like "90", or a clock format like "1:30" (one minute thirty seconds) or "1:02:03" (one hour two minutes three seconds).
What happens if I leave the End field blank?
Audio Trimmer trims from your Start time through to the end of the file.
What if I set an End time earlier than the Start time?
Audio Trimmer stops and shows an error message instead of producing a clip, so you never end up with a broken file.
Which audio formats can I trim?
MP3, WAV, AAC, OGG, FLAC, and M4A are all supported, and the downloaded clip keeps the same format as the file you uploaded.
What is the trimmed file named?
The download keeps your original file name with "-trimmed" added before the extension, for example "podcast-trimmed.mp3".
What if the file doesn't upload correctly?
If no file was received, Audio Trimmer shows a plain error message in the output area instead of leaving it blank.
Can I preview the trimmed clip before downloading it?
No preview player is built into the page. Audio Trimmer gives you a download link for the result, so you open it in your own player to check it.
What if my file's format isn't in the list above?
The trim still runs and downloads correctly, just with a generic file type label instead of a specific one for that format.
Does the browser have to reload the trimming engine every time?
Only once per tab. Reloading the page or opening a new tab loads the engine again, but repeated trims within the same tab reuse it without a fresh download.
What shows up if something goes wrong during the trim itself?
The status line above the output area shows the underlying processing message, so you can see what happened instead of the tool just stopping with no explanation.