Split Audio
Processed locally in your browser — nothing is uploaded.
Quick answer
Splitting audio divides one file into two at a timecode you choose: everything before the split point becomes part one, everything after becomes part two. It is the exact inverse of merging. This tool makes the cut in your browser and hands you both files, with nothing uploaded. First use downloads the ~32 MB engine once, and it stays cached for every later split.
How to split audio
Load the file
Drop in the audio you want to divide. The waveform and total duration are shown.
Set the split point
Enter the timecode where the file should be cut, or click on the waveform. A marker shows exactly where part one ends and part two begins.
Split and download both
Cut the file and download both halves. Each keeps the original format.
How is splitting different from trimming or cutting?
They sound similar but do different things, and picking the right one saves a lot of fiddling:
| Operation | What you get | Best for |
|---|---|---|
| Split | Two files, both kept, cut at one point | Separating chapters or tracks |
| Trim | One file — a kept region, ends dropped | Topping and tailing |
| Cut | One file with a section removed and rejoined | Deleting a bad patch |
The defining feature of a split is that nothing is discarded — both pieces survive. That is why it is the tool for dividing, not deleting: a long DJ set into individual tracks, an audiobook recording into chapters, a two-part interview into its halves.
Because both halves are exported at once, a split is also the quickest way to hand two people two parts of the same session, or to break a single oversized recording into pieces that each slip under a platform’s upload limit. Nothing is re-encoded when the format supports a clean copy, so the two parts together are bit-for-bit the same audio as the original — simply carried in two containers instead of one.
How accurate is the split point?
On lossless formats (WAV, FLAC) the cut is sample-accurate, landing on the exact timecode. On MP3 and other frame-based formats the split snaps to the nearest frame boundary — around 26 ms for MP3 — because those formats are stored in indivisible frames. For track and chapter boundaries, which usually fall in a gap or a pause, that is far more precise than you need.
Will the halves have clicks at the cut?
If the split lands mid-waveform, the new start of part two (and the new end of part one) can click, just like any hard edit. If you hear one, apply a very short fade in and out to the fresh edges and it disappears. Splits placed in silence or a pause almost never click.
Where you place the split therefore matters as much as the timecode itself. Aiming for a natural pause — the gap between tracks, the beat of silence between chapters, the breath between questions — gives you clean edges for free and spares you having to fade them at all. When the material has no such gap, the fade is your fallback.
Is the file uploaded to split it?
No. The split is performed by ffmpeg.wasm inside your browser: the file is read, sliced at your timecode, and both halves are produced locally as downloads. No upload takes place — verify it in DevTools → Network. Confidential recordings and unreleased material never leave your device.
Related audio and video tools
The inverse is merge audio, which joins files back into one. To keep just one region rather than both, use trim audio; to remove a middle section, the audio cutter. Smooth the new edges with fade in and out. And when the recording lives inside a movie, extract the audio from the video first, then split it here.
Your files never leave your device
Processed locally in your browser — nothing is uploaded. You can verify it yourself: open your browser’s developer tools, watch the Network tab, and use the tool — no upload request is ever made.
Frequently asked questions
Does splitting keep both parts of the file?
Yes. A split produces two files and discards nothing — everything before the timecode is part one, everything after is part two.
How do I split a file into more than two pieces?
Split at the first point, then load part two and split it again at the next point. Repeat for each boundary you need.
How accurate is the split point?
Sample-accurate on WAV and FLAC. On MP3 it snaps to the nearest frame boundary (about 26 ms), which is more than precise enough for chapter and track breaks.
Do the two halves keep the original format?
Yes. Both parts are written in the same format as the source, with no conversion.
Why is there a click at the split point?
The cut may have landed mid-waveform. Apply a very short fade to the new edges to remove it. Splits placed in a pause rarely click.
What is the difference between split and trim?
Split gives you both pieces cut at one point. Trim keeps a single region and discards the ends. Use split to divide, trim to top and tail.
Is my audio uploaded to split it?
No. The split runs entirely in your browser via WebAssembly. You can confirm there is no upload in the Network tab of your developer tools.