Split Video Into Parts
Cut a long video into parts that each fit under a size limit, at full original quality, because nothing is re-encoded.
What this page is for
Compressing a long video to fit a limit costs quality, and past a few minutes it costs too much. Splitting keeps every frame exactly as it was and sends the video in pieces instead.
This page cuts on the video's own key frames, so each part is a straight copy of the original data: no quality loss, and fast even on a phone.
The rule: each part under the cap
Pick the destination and every part is sized to fit it: 20 MB for Discord on a free account, 16 MB for a WhatsApp video, 18 MB to stay an attachment in Gmail.
A video can only be cut cleanly where it has a key frame, a full picture the following frames build on. Phones usually place one every second or two, so parts come out close to the cap. If a video has key frames far apart, a part can run over; the page tells you, and the fix is to compress first.
Worked example
6 minute screen recording, 1080p, 96 MB, split for Discord. At about 2.1 Mbps, a 20 MB part holds roughly 68 seconds.
Result: six parts of about 17 to 18 MB each, every one playable on its own at the original quality.
How to use it
- Pick the size limit for where the parts are going.
- Tap Choose file and select the video.
- Tap Split video.
- Download each part.
- Send them in order; the file names say which part is which.
Questions
Does splitting lose quality?
No. The parts are copies of the original data, cut at key frames. Nothing is re-encoded.
Why are the parts not exactly the same length?
Cuts can only fall on key frames, so each part ends at the last key frame that keeps it under the cap.
Should I compress or split?
For clips under about two minutes, compressing keeps it to one file. For longer videos, splitting keeps the quality. For both, compress first, then split.
Does it work on iPhone?
Yes, in Safari, because nothing is re-encoded. Very large files can still run out of memory; split on a computer if the tab reloads.
Is my video uploaded?
No.
Related tools
Sizes and results are estimates produced by your own browser. A file that fits the cap is not a guarantee that the destination will accept it: services change their limits, and some check more than size. On iPhone and iPad, Safari limits memory and codecs, so large files can fail there that work on a computer. Keep your original file.