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MP3 Splitter

Split a long recording into parts: a set number of equal pieces, pieces of a fixed length, or cuts at the exact times you type. Every part comes out as an MP3, one by one or all in a ZIP. Free, no account, and the file is processed in your browser and is not uploaded.

Drop an audio file here or click to browse

MP3, M4A, AAC, WAV, OGG, OPUS, FLAC, WEBM or MP4, up to 100 MB and 30 minutes.

The file is processed in your browser and is not uploaded.

How to split an MP3

Three steps. Nothing is written until you press the button.

  1. 1

    Open the recording

    Drop an MP3, M4A, WAV or other audio file up to 100 MB and 30 minutes. The page decodes it in your browser and draws the waveform, so you can see where the quiet stretches are before you choose the cuts.

  2. 2

    Choose how to split it

    Equal parts (2 to 20), a fixed length such as 5:00 per part, or the exact times you type, one per line. The cut points appear on the waveform and the page tells you how many parts you will get and how long each one is.

  3. 3

    Split and download

    Each part is encoded as its own MP3 at the bitrate you pick. Play any part, download them one at a time, or press Download all as ZIP to get every part in one file with the parts numbered in order.

Three ways to split, one ZIP at the end

Pick the one that matches what the other side needs.

  • Equal parts

    Choose a number from 2 to 20 and the recording is cut into pieces of the same length. The quickest way to get a one-hour export or a long interview under someone else's size limit.

  • Fixed length

    Set minutes and seconds per part, at least 5 seconds, and the recording is cut every that often; the last part is whatever is left. 10:00 per part fits each piece inside the Audio to Text Converter's cap. Up to 100 parts.

  • At timestamps

    Type the times to cut at, one per line, as m:ss, m:ss.s or h:mm:ss, up to 50 of them. Useful when the chapters or the questions are at known places and you want one file per section.

  • Download all as ZIP

    The parts are numbered in order (interview-part-01.mp3, interview-part-02.mp3 and so on) and packed into one ZIP written on your device, with no compression on top of the MP3s, so it opens anywhere.

Why people split a recording

Usually because something downstream has a limit that the whole file breaks.

  • A transcription cap

    Free converters, this site's included, take a few minutes at a time. Cut the recording into pieces under the cap, transcribe each one, and paste the transcripts together.

  • An upload or email limit

    A form that stops at 25 MB, a mail server that bounces large attachments, a chat that refuses long audio: several smaller files go through where one large one does not.

  • One file per question or chapter

    An interviewer who wants each answer as its own file, a podcaster cutting an episode into segments, a trainer splitting a lecture by topic: type the times and get one file per section.

  • The right minute, shared

    Splitting a 40-minute call into four pieces and sending the one that matters is faster than describing where to listen. If you need a single stretch from the middle instead, the Audio Trimmer keeps just that.

An audio splitter for parts, not for vocals

This page splits a recording along time: one file becomes several shorter files that follow each other. It does not separate vocals from music or one speaker from another; tools called stem splitters or vocal removers do that, and they are a different kind of program.

The parts are cut at the sample nearest each cut point. A cut in the middle of a word is audible, so in equal-parts and fixed-length mode look at the waveform and nudge the plan if a cut lands on speech; in timestamp mode put the times in the pauses.

If you only need one stretch of the recording, the Audio Trimmer keeps a selection and drops the rest. If you have the parts and need the whole again, the Audio Joiner puts them back in order.

Quality and formats

The splitter opens MP3, M4A, AAC, WAV, OGG, OPUS, FLAC, WEBM and MP4 audio, up to 100 MB and 30 minutes, when your browser can decode the format. Safari opens OGG and Opus files only from version 18.4; Apple .caf files and copy-protected audio cannot be opened in any browser.

Every part is encoded as a new MP3 at 96 to 320 kbps, 128 by default. Encoding an MP3 again loses a little detail; for speech at 128 kbps you will not hear it, and for anything you plan to edit further pick 192 or 320. The parts keep the recording's channels and sample rate.

The limits are there for memory: the whole recording is decoded on your device before it is cut, and the parts are held in memory until you download them. For a longer recording, export it in halves from your recording app or editor first.

More on the recordings people split: how to transcribe an interview, podcast transcription, the documentary interview.

Record it once and get one transcript, with nothing to split

You are splitting a long recording so something else can handle it in pieces. ParrotNotes records up to 3 hours in one recording on Pro and gives you one transcript, one summary and the action items, so there is nothing to cut and nothing to stitch back together. Free for 100 minutes of recording a month.

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Related tools

MP3 splitter FAQ