Split MP4 Online - Free MP4 Splitter
Split an MP4 file without uploading it anywhere. MP4 is the format most people arrive with, and it is also the easiest one to cut losslessly. Drop your file above, choose where to split, and download the parts. Everything runs locally in your browser — no upload, no signup, no watermark.
Everything runs locally in your browser. No upload, no queue, no server-side size limit. Parts are made by copying the encoded video stream — no re-encoding, no quality loss.
No upload, ever
A 2 GB MP4 opens in seconds, because nothing is being sent anywhere.
Lossless by default
Video streams are copied, not re-encoded, so quality matches your original.
Free MP4 splitter
No account, no email, no per-file charge, no watermark on the output.
How to split an MP4 file online
Add your MP4
Drag the file onto the box above or click to browse. A 2 GB file opens in seconds rather than spending ten minutes uploading, because your browser reads it straight from your disk. WebM and MOV work the same way.
Choose how to cut
Pick equal parts, a fixed duration, or your own timestamps. For MP4, custom cut points are worth using: MP4 timestamps are accurate to the millisecond, so the cut lands where you put it instead of drifting.
Split
The segments are produced on your own device. No queue, no rate limit — a second file can start the moment the first finishes.
Save the parts
Every segment appears with a length, a size, and a download button. Take one or save them all, then rename them before publishing.
Why MP4 is the easiest format to split losslessly
MP4 stores its video in H.264 or H.265, the two codecs essentially every browser can already read. When the output can keep the same codec as the source, the splitter can copy the encoded video stream instead of decoding and re-encoding it. Copying is fast, and it changes nothing about the picture. The catch is keyframes: an encoder stores one complete frame every second or two, then records only what changed between. A cut inside that gap either moves to the nearest keyframe or re-encodes the small section around it. The practical rule for MP4: the format is not the obstacle, the cut point is.
Three ways to split an MP4
| Mode | How it works | Best for MP4 |
|---|---|---|
| Split into equal parts | Enter how many parts — 2, 3, 10 | A series of evenly sized episodes |
| Split by duration | Set a fixed length, such as 60 seconds | Fitting clips to a platform's time limit |
| Custom cut points | Place markers at exact timestamps | Pulling specific moments out, where MP4's accurate timestamps pay off |
Common MP4 splitting situations
iPhone and Android recordings that ran too long
Phone cameras record 4K by default, and a ten-minute clip can pass a gigabyte. Splitting a long recording into shorter parts is faster than exporting it again at a lower resolution, and every part keeps the quality the camera captured.
Files too large to email or upload
Mail boxes and web forms reject attachments above a certain size. Instead of compressing the video and accepting a softer picture, split the MP4 into two or three files that each fit — the quality stays exactly where it was.
Cutting a downloaded MP4 into short clips
If you have pulled a video down from somewhere and only two moments in it are worth sharing, custom cut points produce those two files without touching the rest, and without installing an editor anywhere.
Sharing one section of a long recording
Conference talks, lectures, and interviews are usually published as one long MP4 that is awkward to link into. Split it at the chapter boundaries and each part gets a name a viewer can understand before clicking.
Supported formats
Input: MP4 (H.264, H.265/HEVC), WebM, MOV. Output: MP4 or WebM, whichever matches the source codec. Use up-to-date Chrome, Edge, or Opera on desktop for the smoothest results.