Split a long recording, mix, audiobook or podcast into separate files. Divide it into equal parts, cut every few minutes, split automatically at pauses, or place your own markers on the waveform, then download all parts as a ZIP.
Last updated:
Split by
Quick
Click the waveform to move the playhead, then press Add split at playhead (or the M key). Drag a marker to move it; select it and use ←→ to nudge or Delete to remove it.
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0 parts
Include
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Name
Start
Length
Actions
{name} = original name, {n} = part number
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How to use the Audio Splitter
Open your audio file: drop it on the box or click to choose. The waveform appears in a moment.
Choose how to split: a number of equal parts, a part length such as 5 minutes, at silences, or manual markers.
Fine-tune the splits: drag a marker on the waveform, click to move the playhead and press Add split at playhead, or double-click a marker to remove it.
Check the parts: play each one, rename it, or untick parts you don't want.
Download: choose WAV or MP3 and press Split and download ZIP, or download single parts from the list.
Which split mode should you use?
You want to…
Mode
Suggested settings
Make a long file fit an upload limit (e.g. 10-minute chunks)
Length
10:00, snap to quiet moments on
Divide an audiobook or lecture into sessions
Equal parts
Number of sessions, snap on
Separate tracks from a vinyl or tape recording
Silence
−45 dB, minimum silence 1.5 s, minimum part 30 s
Cut a podcast into questions or topics
Silence, then Manual
−40 dB, 0.8 s; then drag or add markers
Split a voice memo into separate notes
Silence
−35 dB, 2 s, trim silence at the edges
Choose exact cut points yourself
Manual markers
Click, listen, press M to add a split
Understanding the silence threshold
Levels are measured in decibels relative to full scale (dBFS), where 0 dB is the loudest possible sample. Speech and music usually sit between −30 and −10 dB RMS; room noise in a quiet recording is often around −60 to −50 dB. A threshold of −40 dB treats anything quieter than about 1% of full amplitude as silence. The dashed red lines on the waveform show the threshold so you can see which pauses qualify.
The minimum part length prevents tiny fragments: a pause is only used as a split if the part before it is at least that long. Set it to 0 to split at every qualifying pause.
Keyboard shortcuts
Space: play or pause from the playhead.
M: add a split at the playhead (switches to manual markers).
On a focused marker: ← / → move it by 0.1 s (hold Shift for 1 s), Delete removes it, Enter moves the playhead to it.
Frequently asked questions
How do I split an MP3 into equal parts?
Open the file, choose Equal parts and enter the number of parts. The split points are placed at equal intervals; with Snap to quiet moment on, each one moves to the quietest spot within about a second so words and notes are not cut in half. Then press Split and download ZIP.
How does splitting at silence work?
The tool measures the loudness of every 10 ms of audio. Wherever the level stays below the threshold (for example −40 dB) for at least the minimum silence time, a split is placed in the middle of that pause. Raise the threshold for noisy recordings and lengthen the minimum silence to split only at long gaps, such as between songs or chapters.
Is the audio re-encoded, and will quality drop?
Parts saved as WAV are lossless copies of the decoded audio at the original sample rate. MP3 parts are encoded once from the decoded audio, so choose 192 or 320 kbps when the source is a high-quality MP3. No quality is lost from the splitting itself.
Can I split a long audiobook or a recording of several hours?
Yes, as long as your device has enough memory, because the whole file is decoded in the browser: roughly 21 MB per minute of stereo audio at 44.1 kHz. A 2-hour recording needs about 2.5 GB of free memory, which works on most desktop computers but may be too much for some phones.
What are the 5 ms fades for?
Cutting a waveform at an arbitrary point can create a tiny click when the part starts or ends. A 5 millisecond fade-in and fade-out is too short to hear as a fade but removes the click. Turn it off if you need sample-exact parts to join back together.
Are my files uploaded?
No. The file is decoded, analysed and split with the Web Audio API and JavaScript in your own browser, so the audio never leaves your device.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.