How to extract an audio segment by timestamp — no upload
- Step 1Upload your audio file — Drop your audio file.
- Step 2Set start and end times — Set exact start and end times.
- Step 3Download the trimmed clip — Download the segment.
Frequently asked questions
How precise can the trim be?+
For WAV and FLAC (uncompressed PCM), cuts are sample-accurate — you can trim to the exact millisecond. For MP3 and AAC (compressed), precision depends on the codec's frame size: MP3 frames are 26ms at 44.1 kHz, so lossless stream copy cuts snap to the nearest frame boundary. For exact millisecond MP3 cuts, the tool re-encodes the trim point frames.
Will trimming MP3 affect the audio quality?+
Stream copy trimming (at keyframe boundaries) is lossless — the original MP3 frames are preserved. Only the frames at the exact trim boundary are re-encoded if millisecond precision is required. The vast majority of the file is untouched.
Can I trim audio to use as a ringtone?+
Yes — trim to your desired length (most platforms accept up to 30 seconds for ringtones), export as MP3 or M4R (for iPhone). iOS requires the .m4r extension specifically — after trimming, convert to M4A and rename to .m4r, then sync via Finder.
Privacy first
All audio processing runs locally in your browser using FFmpeg compiled to WebAssembly. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.