How it works
- Drop your audio file. MP3, WAV, FLAC, AIFF, OGG or M4A up to 500 MB — it's decoded locally, nothing is uploaded.
- Frame your selection on the waveform. Drag the region handles or type exact start/end times, choose Keep or Remove, snap the cut to the detected beat grid and add fades if you need them.
- Export and download. The cut is rendered in your browser and downloaded in the same format as the original file.
Features
- 100% in your browser. Your file never leaves your computer — the preview runs on the Web Audio API and the final render on ffmpeg.wasm, no upload.
- Precise visual selection. Zoomable waveform, draggable handles and mm:ss.ms time fields for millisecond-accurate cuts, in Keep or Remove mode.
- Beat-locked cutting. The tempo is detected automatically and the handles snap to the beat grid — BPM and offset stay adjustable by hand.
- Click-free cuts. Edges land on the nearest zero crossing and the join of a removed passage gets a 10 ms crossfade, so the cut doesn't click. Keyboard shortcuts I / O set the start and end at the playhead, arrow keys nudge them.
- Logic-style fades. Fade in and fade out with draggable length and curve handles, previewed in real time before you export.
FAQ
Is this audio trimmer free?
Yes. Without an account you get 2 free exports per day across AudioKit's free tools; with a free account, 5 per day. Loading a file, previewing your cut and rendering it don't count; only the first download of the result does, and downloading it again is free. If you need more, AudioKit Premium removes the daily limit. There's no watermark and no feature lock: the free trim is the full trim.
Is my audio file uploaded to a server?
No. The whole tool runs in your browser: your file is decoded locally with the Web Audio API for the waveform and preview, and the final cut is rendered on your own machine with ffmpeg.wasm. The audio never leaves your computer. The only network call is a tiny anonymous counter that tracks your daily free quota.
Which audio formats are supported?
MP3, WAV, FLAC, AIFF, OGG and M4A files up to 500 MB. By default the trimmed file is exported in the same format as the original — an MP3 in gives an MP3 out, a WAV in gives a WAV out, at the same bit depth — and you can pick another format before exporting. If your file is in another format, run it through our free audio converter first.
Does trimming reduce audio quality?
It depends on the format. Lossless files (WAV, AIFF, FLAC) are re-rendered losslessly, so nothing is lost. Lossy files (MP3, OGG, M4A) must be decoded and re-encoded to apply the cut and fades — MP3 and M4A are re-encoded at least at the bitrate of your file (320 kbps for a 320 kbps MP3, VBR V0 for a VBR MP3, 320 kbps MP3 from a lossless file) — which adds one generation of lossy compression. That's inaudible in most situations, but start from a lossless file when quality is critical. For an MP3 you can also tick “Cut the MP3 without re-encoding” (Keep mode): the original frames are copied as they are, so the quality is identical, but the cut is only accurate to about 26 ms (one MP3 frame) and fades are not available.
How do I cut a song for a ringtone?
Load the song, leave the tool in Keep mode, then drag the region handles around the part you want — or type exact start and end times in mm:ss.ms. Most phones expect ringtones of about 20–30 seconds. Add a short fade in and fade out (0.5 s works well) so the clip doesn't click, then download the trimmed file.