Trim and Cut Audio Files

How to Trim and Cut Audio Files

  1. 1

    Add your files

    Drop one audio file or a whole batch onto the page, or click to browse. WAV, MP3, M4A, OGG, FLAC and AIFF all work, and nothing is uploaded.

  2. 2

    Drag across the waveform

    Each file opens as just its waveform. Drag across it to select, and the selection is tinted with the audio either side left fully visible, so you can see what you are cutting towards. Type exact timecodes into the start and end fields when a drag is not precise enough, and zoom to the selection to place the edges to the syllable. In a batch, click each file to give it its own selection.

  3. 3

    Keep it or cut it

    Keep the selection to crop the file down to it. Remove the selection to take that stretch out and join what is left. Press Play to hear the result before you commit — in remove mode it plays across the join, which is the part worth checking.

  4. 4

    Trim and export

    Choose WAV or MP3 and press Trim and export, then download each file or the whole batch as one ZIP. Files you did not select anything in are skipped, and the originals on your disk are never touched.

What this is

Most of a recording is usually not the bit you need. Drag across the waveform to pick out what is, listen back to check you have not clipped the start of a word, and export just that. Or invert it: select the cough, the phone buzz, the thirty seconds where someone came into the room, and take that out instead — the two sides are joined back together with no gap. This is the cut you make because you listened to the tape, which is a different job from Remove Silence, where a threshold decides for you. The surviving audio is copied through sample for sample at its original rate, so trimming costs nothing in quality, and because it runs in your browser an interview you are not allowed to upload can be cut here too.

How it works

There is no model here and no processing worth the name — that is the point. Your file is decoded to raw samples through the Web Audio API, and the export is the samples inside the range you picked, copied verbatim into a new buffer at the source's own sample rate and channel count. Nothing is resampled, no gain is applied, and no encoder runs unless you ask for MP3 on the way out. A cut is exact to the sample: the edges land where the timecode says, and in remove mode the two surviving pieces are concatenated with no crossfade, so nothing is invented at the join. Choosing WAV out of a WAV in means the audio you get back is bit-for-bit the audio you put in, minus what you cut.

Supported formats

WAV, MP3, M4A, AAC, OGG, FLAC and AIFF. Most formats are decoded by your browser, so anything it can play works here too — AIFF is decoded by the site itself, since most browsers cannot read it. The trimmed audio is exported as an MP3 at the bitrate you choose, or as a lossless WAV.

Frequently asked questions

Is my audio uploaded anywhere?
+Is my audio uploaded anywhere?
No. Everything runs inside your browser using the Web Audio API, so the file never leaves your device. You can prove it: load the page, turn off your Wi-Fi, and the tool still works.
Does trimming lose any quality?
+Does trimming lose any quality?
Not in itself. The samples you keep are copied across untouched, with no resampling and no gain change, so a WAV in and a WAV out is bit-for-bit identical apart from what you cut. Exporting as MP3 re-encodes, which is lossy — if your source was already an MP3 and you want to avoid a second generation of loss, export as WAV.
Can I cut a section out of the middle?
+Can I cut a section out of the middle?
Yes — that is what Remove the selection does. Select the part you want gone, and the audio either side of it is concatenated. The join is a straight cut with no crossfade, so if you are cutting mid-sentence it is worth pressing Play to hear it; the preview starts a couple of seconds before the join for exactly that reason.
How is this different from Remove Silence?
+How is this different from Remove Silence?
Remove Silence finds the cuts for you by measuring the level and taking out everything below a threshold, which is the right tool for dead air spread through a whole recording. This one cuts where you say, which is the right tool when the thing you want gone is not quiet — a bad take, a ramble, a phone ringing — or when you only want one specific stretch of a long file.
Can I trim a whole batch at once?
+Can I trim a whole batch at once?
Yes. Drop in as many files as you like and give each one its own selection — the in and out points that are right for one recording are rarely right for the next, so every file keeps its own. One press exports them all, and Download all hands them back as a single ZIP. If you want the same edit applied identically across a folder instead, Chain Tools runs a batch through a pipeline of blocks.
Does this use AI?
+Does this use AI?
No, and it would be a strange place for it. Trimming is copying the samples you chose into a new file — there is nothing to predict and nothing to get wrong, which is why the result is exact rather than approximate. Audio Magic does use AI where it genuinely earns its place: Whisper for transcription, DeepFilterNet and RNNoise for background noise, Demucs for stem separation, all running on your own device.
Do I need an account?
+Do I need an account?
No. The free tools work straight away with no sign-up, up to 15 minutes of audio per tool per day. An account is only needed if you subscribe to remove the limit.
Is it free?
+Is it free?
Yes. Every tool on this page is free to use, with a daily limit on total audio processed. There is no watermark and no trial period.

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