Split Video into Parts: Stories, Status, LINE, Free

How to split a video into parts

Choose a video, then choose how to split it: by the length of each part (type the seconds, or press a preset) or into a number of equal parts, from 2 to 100. A part length must be at least 1 second. Before you start, the page tells you how many parts you will get and, for a fixed length, how long the last one is (if it cannot read the video's length, the number of parts is worked out while splitting). Press Split video and the parts appear as a list, named after your file with a number (for example holiday_part01.mp4), each with its real length and size and its own Download button. Exact writes MP4 files; Fast keeps a WebM or MKV source in its own type and writes MP4 for anything else. Download all as a ZIP puts every part in one archive; the ZIP is built only when you press that button, and it is offered up to 512 MB in total, because the parts and the archive are both held in memory. A single run makes at most 100 parts.

Fast or Exact: what each cut method does

Fast copies the first video track and the first sound track without re-encoding them, so nothing is lost in quality and it is quick (other tracks, such as extra languages or subtitles, are not carried into the parts). The price is that a part can only start at a keyframe, one of the full pictures a video is built from. Parts therefore start at the first keyframe at or after each cut, their lengths vary, and some can be longer than the length you asked for; if a video has few keyframes, you can get fewer parts than planned. The page shows the real length of every part and says so when parts run over. Exact re-encodes the video as H.264 with AAC sound in an MP4 and forces a keyframe at every cut, so each part has the length you asked for, give or take a fraction of a second. It takes longer, the result is not the original quality bit for bit, the picture size is kept, and a side with an odd number of pixels is trimmed by one pixel to make it even. Exact also uses only the first video track and the first sound track. If a file cannot be copied into the output format, Fast falls back to Exact and tells you.

What the platforms' own pages say (read 15 October 2026)

The presets are shortcuts to figures that appear on platforms' help pages or in a report (explained below), plus two plain lengths (15 and 30 seconds) that are not platform figures. WhatsApp's Help Center page on sending media says Status videos can be up to 90 seconds. Instagram's help page on Stories says a video longer than 60 seconds can be edited with the trimmer (iOS) and does not state a maximum Story length, so the 60-second preset is a handy length, not an Instagram limit. For LINE, a Japanese tech site (April 2025) reports that chat videos longer than 300 seconds are cut; that is a secondary source and LINE's own help page was not checked, so check the current rule. Apps change these rules and also limit file size, format and shape, which this tool does not check.

What this tool does not do

It does not choose scenes, add titles or captions, change the picture shape or aim at a file size for the parts. To join parts again use Merge Videos, to cut one section use the Video Trimmer, to make a part fit a size limit use the WhatsApp Video Compressor or the Instagram Video Compressor, and to change the shape use Change Video Aspect Ratio. A file the browser or the engine cannot read will fail, and files over about 2 GB are most likely too large to read in a browser tab. The parts are held in memory while they are made, and if the file cannot be read in place it is copied into memory too, so very large videos can fail on a phone; a computer works better.

Sources and checks

• FFmpeg documentation: segment muxer: the muxer that writes the parts. It says every segment starts with a keyframe and that segment_times takes a list of split points, which is why Fast cuts only at keyframes.
• FFmpeg documentation: -force_key_frames: forces a keyframe at the first frame at or after each given time, which is how Exact makes every part start where the cut is.
• ffmpeg.wasm: the WebAssembly build of FFmpeg that does the work inside this page, so the video never leaves your device.