Trim Video
Trim and cut video files — a fast cut without re-encoding, or to the exact frame
Files up to 300 MB · MP4, MOV, WebM, MKV, and more · the fast cut never uploads your video
Click or drop a video file hereChoose a video file
About Trim Video
Trim Video keeps the part of a video between a start point and an end point. The fast cut, the default, copies that part without re-encoding, with ffmpeg.wasm in your browser: the format, codecs, and quality stay those of your file, and the clip begins on the keyframe at or before your start, which can be a little early on phone videos. Check "Precise cut" to begin on the exact frame: the clip is then re-encoded to an MP4 with H.264 and AAC, in your browser when the page estimates that takes under about 45 seconds or when the video has an odd width or height, otherwise on our video service.
Example
A 2-minute phone video where only the 22.5 seconds from 0:41.3 to 1:03.8 matter.
What you set
File: beach.mov (H.264, 1920×1080, 2:05) Start: 41.3s · End: 63.8s Button: Trim video (22.5s)
What you get
Fast cut → trimmed_beach.mov same codecs and quality, starts on the keyframe at or before 41.3s: can run a little over 22.5s Precise cut → trimmed_beach.mp4 H.264 + AAC, starts at 41.3s exactly, 22.5s long
How to trim a video
- 1Choose or drop a video file of up to 300 MB on a computer, or 100 MB on phones and tablets.
- 2Move the "Start" and "End" sliders to the part you want to keep.
- 3Leave "Precise cut" unchecked for a lossless copy, or check it to begin on the exact frame.
- 4Click "Trim video"; the first run also loads the ffmpeg.wasm engine, about 10 MB.
- 5Check the real length shown under the player, then click "Download": your file's own format, or MP4 with "Precise cut".
Formats and limits
- Input formats
- MP4, M4V, MOV, WebM, MKV, AVI, WMV, FLV, OGV, 3GP, 3G2, MPG, MPEG, TS, MTS, M2TS
- Output
- Fast cut: the source's own format (MP4, MOV, WebM, MKV, and others), every audio track kept. Precise cut: MP4 with H.264 and AAC
- Maximum file size
- 300 MB on a computer; 100 MB on phones and tablets
- Cut points
- Set in steps of 0.1 seconds; the fast cut starts on the keyframe at or before the start, a Precise cut on the exact frame
- Where a Precise cut runs
- Chrome, Edge, and other Chromium browsers: 1080p clips up to about 12 seconds, 720p up to about 27, 4K up to about 3. Firefox, Safari, and others: 1080p up to about 1.5 seconds, 720p up to about 3.5. Longer clips go to our video service; videos with an odd width or height always stay on your device
- Usage limits
- Only a Precise cut sent to our video service counts toward the hourly and daily limit of your internet connection
Common uses
- A phone clip to share
- A 2-minute MOV from a phone where only 20 seconds matter: the fast cut keeps those seconds as a MOV in the original quality, without sending the video anywhere. If the clip opens a moment too early, run it again with "Precise cut".
- A screen recording with dead time
- A screen recording, MP4 or WebM, usually opens on the click that started it and closes on the stop button. Move both sliders past them; the clip keeps the format of the recording.
- A clip that must open on a cue
- For a tutorial step or a goal in a match video that must start on an exact frame, check "Precise cut": the clip comes back as an MP4 with H.264 picture and AAC sound, which phones and browsers play.
- A film with several languages
- An MKV with two audio tracks and subtitles keeps all of them in a fast cut, so a scene taken out for a language class still has its second soundtrack.
Which tool to use
- Trim Audio: Trim Audio works on sound files only, to the tenth of a second, and can add a fade-in or a fade-out. Trim Video keeps the picture and every audio track together, with no fades.
- Merge Videos: Merge Videos does the reverse and joins several clips into one MP4; after two trims here, it is how you drop a scene from the middle.
- Video to GIF: Video to GIF also takes a start time and a length, up to 60 seconds, but builds a silent animated GIF on our video service. Trim Video gives back a real video, sound included.
- Resize Video: Resize Video changes the picture instead of the length: it crops the edges or scales the video, then re-encodes it to MP4 on our video service.
Where your file is processed
For the fast cut, nothing is uploaded: ffmpeg.wasm, loaded from unpkg.com, makes it in your browser. A Precise cut stays in your browser when the page estimates under about 45 seconds of work or the video has an odd width or height. Otherwise, the piece from the keyframe before your start goes to our video service (the whole file if no keyframe is found), which deletes it after the cut and the result once downloaded. A shown error sends us its cleaned message, error type, the tool name, your browser and version, the file type, and a size range.
Frequently asked questions
Why does my clip start earlier than I chose?
The fast cut copies the video without re-encoding, and a copy can only begin on a keyframe: the clip starts at the keyframe at or before your start point. The page shows the real length of the result. Check "Precise cut" to begin on the exact frame.
What is the difference between trimming, cutting, and cropping?
Trimming, often called cutting, keeps one stretch of time and drops what comes before and after it: that is what this page does. Removing a scene from the middle takes two trims joined with Merge Videos. Cropping removes the edges of the picture, not time: Resize Video does that.
Is the video re-encoded?
No, not by default: the selected part is copied as it is, so quality and format do not change. With "Precise cut", yes: the clip is encoded again to MP4 with H.264 picture and AAC sound.
What format do I get?
The same as your file with the fast cut: an MP4 stays MP4, a MOV stays MOV, a WebM stays WebM, an MKV stays MKV. All audio tracks are kept, and subtitles in MKV and WebM. With "Precise cut", always an MP4.
What is the file size limit?
300 MB on a computer and 100 MB on phones and tablets. The whole video is held in the browser tab's memory while it is cut, so the limit is checked as soon as you pick the file.
Is my video uploaded for a Precise cut?
No, unless the page estimates that re-encoding in your browser would take over about 45 seconds, which is common in Firefox and Safari and for longer clips; videos with an odd width or height always stay on your device. Then the piece from the keyframe before your start to just after your end goes to our video service, or the whole file when no keyframe can be found.
Can I cut a scene out of the middle?
Not in one pass: the page keeps one stretch, from "Start" to "End". Trim the part before the scene and the part after it as two clips, then join them with Merge Videos.
Does the length of the video matter?
Only through the file size, since the page sets no limit in minutes. For a "Precise cut", though, a longer kept part makes it more likely that the re-encoding goes to our video service instead of running in your browser.
Does the trimmed video get a watermark?
No. Nothing is drawn on the picture: the fast cut copies the frames untouched, and a "Precise cut" re-encodes them without adding anything.
Does trimming change my original video?
No. The page reads your file and gives you a new one, named "trimmed_" followed by your file's name; your original file is never changed.
Can I trim a video on an iPhone?
Yes, files up to 100 MB. iOS shrinks a video picked from Photo Library before the page gets it, so to cut the original, save it to Files first and pick it from there.
Tips and tricks
- ✓If the page says a file cannot be cut without re-encoding, check "Precise cut" and click "Trim video" again.
- ✓To set a point to the tenth of a second, click a slider, then press the left or right arrow key: each press moves it by 0.1 second.
- ✓A fast cut weighs roughly its share of the original: 20 seconds out of a 2-minute, 240 MB video come to about 40 MB, a little more when the clip starts on an earlier keyframe. A Precise cut is re-encoded, so its size can differ.