Audio Trimmer
Cut songs, voice memos and podcasts to the part you need, with optional fade in and fade out.
🔒 Your audio is processed locally in your browser. Your file is never uploaded.
✔ Done — what’s next?
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How to use the Audio Trimmer
- Choose an audio file and play it.
- Set start and end with "Set to current time"; add fades if you like.
- Click "Trim" and download.
Common use cases
- Make a 30-second ringtone from a song
- Remove silence at the start of a recording
- Clip a quote from a podcast or interview
Example
Start 00:45, end 01:15 with 2-second fades turns a song into a 30-second MP3 ringtone.
What the Audio Trimmer does
It cuts an audio file down to the part between a start and end time and can fade the sound in and out smoothly. Play the file, press Set to current time at the right moments, and download. Use it for ringtones (30 seconds is typical), podcast quotes, removing silence or splitting a long recording.
The cut is exact to the millisecond, because the audio is re-encoded at high quality in the same format as your original unless you choose another one.
Frequently Asked Questions (FAQ)
Q: Is my file uploaded to a server?
A: No. The tool runs FFmpeg compiled to WebAssembly inside your browser tab. Your file is read directly from your device and the result is created locally. Only the video engine itself (open-source ffmpeg.wasm, about 10 MB compressed) is downloaded the first time, from a public CDN; after that it is cached.
Q: How big can the file be?
A: Up to about 500 MB works well on a computer and about 150 MB on a phone. Larger files may still work but can be slow or run out of browser memory. Trimming the clip or lowering the resolution first helps.
Q: Why is it slower than a desktop app?
A: The browser version of FFmpeg runs on a single CPU core and without hardware acceleration. A 1-minute 1080p re-encode typically takes 1–3 minutes. When possible the tools copy the streams without re-encoding, which takes only seconds.
Q: How do I make an iPhone ringtone?
A: Trim up to 30 seconds and save as M4A, then rename the file extension to .m4r and add it through Finder or iTunes. Android phones accept MP3 ringtones directly.