2Drag the start and end handles on the waveform or the timeline, or type exact timecodes if you already know them.
3Preview the selection and run the cut — the part you keep is copied through untouched wherever the format allows it.
4Download the trimmed MP4 file.
MP4 Cutter FAQ
Does the format limit where I can cut?
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It does. MP4 is the safest delivery container: H.264 video with AAC audio plays on effectively every phone, browser and TV without a codec pack. That is precisely what decides whether a cut can be placed arbitrarily or has to land on a structural boundary.
Anything specific to MP4 when trimming?
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Yes — MP4 keeps its index in a moov atom, so a stream-copy edit is near-instant and the result still seeks properly in a browser. It explains most of the "the cut is a fraction of a second off" surprises.
Can I remove a section from the middle instead of keeping one?
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Yes — cut the piece before it and the piece after it, then merge the two results. That is deliberately two steps because it keeps both halves on the fast, lossless path instead of forcing a full re-encode.
How does MP4 Cutter cut the file?
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Concretely, the cut is made at the nearest keyframe and the streams are copied through, which makes it near-instant; frame-exact cuts need the picture re-encoded, so the tool tells you which one you are getting rather than quietly picking. You set the start and end points on the waveform or the timeline and keep what is between them.
Can I run MP4 Cutter on several MP4 videos at once?
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Yes. Uploads queue in parallel, which matters more here than anywhere else because video jobs are minutes rather than seconds. Free accounts run one file at a time; a pass lifts that.
What happens to audio, subtitle and chapter tracks?
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They are carried across. Multi-track audio, embedded subtitle tracks and chapter markers survive wherever the target container can represent them — that is the main thing that separates a proper job from a naive re-encode that silently keeps only track one.
Is there a file size limit on MP4 Cutter?
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Yes: free accounts process video up to 40 MB per file, by far the most generous cap on the site; ffmpeg with x264, x265 and libvpx does the work, which is the same toolchain behind most desktop video software. Video is the one family where the cap is high enough that upload time, not the limit, is what you will actually notice.
Will MP4 Cutter lower the quality of my MP4 videos?
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It depends on whether the job needs a re-encode. Operations that only touch the container or the timeline are done as a stream copy and the picture is bit-identical to the source. Anything that has to redraw frames goes through x264/x265 at a quality level you set, where CRF 23 is visually transparent on most footage.
Why does a Word site host MP4 Cutter?
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WORD.to is built around the editable end of a document's life — the DOCX that is still being written, still being styled and still being argued over, before anyone flattens it for sending. Office files are containers full of other people's media — images, embedded audio, fonts — so the work people need on them is usually the work they would need on those contents anyway. MP4 Cutter shares the upload, the caps and the account with the conversions for that reason.
What should I do with the result once MP4 Cutter is finished?
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The converter on this site takes documents out to PDF for sending, to images for embedding and to plain text for anything that has to read them programmatically, and back the other way. Doing that afterwards keeps the editable original around, which is the part you cannot get back once it has been flattened.
Is MP4 Cutter here the same tool the sibling sites run?
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The engines are shared — the same document toolchain, the same workers, the same limits. What a Word site adds is a view on what survives leaving the Office format and what does not, which is the question every one of these jobs actually turns on. It also starts from one fact about the format this site is named after: the document is a zip of XML, so text edits are cheap and the weight is almost always the embedded images.
Do I need an account, and does anything get kept?
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No account, and nothing is kept: uploads are deleted from the workers shortly after the job finishes, nothing is read and nothing is indexed. Free accounts exist for history and batch size, not for access.
