Video Splitter

Long videos often have to be cut into pieces: stories and status updates accept short clips, messaging apps and e-mail have size limits, and a lecture is easier to share chapter by chapter. This splitter cuts a video every N seconds, into N equal parts, or at the times you list, and hands you every part as its own file (or all of them as one ZIP). Fast mode copies the video and sound without re-encoding, so the parts look exactly like the original. Everything runs in your browser; nothing is uploaded.

How to use this tool

1. Choose a video (MP4, MOV, MKV, WebM, AVI and others).
2. Pick how to split: every N seconds, N equal parts, or at listed times such as 0:30, 1:45.
3. Keep "Fast" for speed and full quality, or choose "Exact cuts" when every part must start exactly on time.
4. Download the parts one by one, or all of them as a ZIP.

Formula

Parts = ⌈length ÷ N⌉ (every N seconds) · part length = length ÷ N (equal parts)

Video is compressed in groups of frames that start with a keyframe, and a copied part can only begin on one. Fast mode therefore starts each part at the first keyframe at or after the time you asked for (phones put one every 1–2 seconds), and the notes list any cut that moved. Exact mode re-encodes once with keyframes forced at every cut, so each part starts on the frame you chose; it takes about as long as converting the whole video.

Example

A 2 min 15 s clip split every 60 seconds gives ⌈135 ÷ 60⌉ = 3 parts: 0:00–1:00, 1:00–2:00 and 2:00–2:15. In fast mode, if the phone wrote keyframes every 2 seconds, the cuts may land up to 2 seconds later, for example at 1:01.3.