Use the free Video Trimmer Online below: cut any MP4 or WebM clip to the exact seconds you want, right in your browser. Your file never leaves your device.
Cut the boring parts out of a video
Most videos do not need every second they were recorded with. A clip starts a little too early, or it runs on after the good part has ended. The Video Trimmer Online above cuts those parts away. You pick a start second and an end second, and the tool saves a new, shorter video with only the part you kept.
Everything happens in your browser. Your video is never uploaded to a server, and you do not need an account or an install. The file stays on your device from start to finish, and the trimmed copy downloads straight to your downloads folder.
How to trim a video
First, choose your video file. MP4 and WebM work in most browsers. MOV works too, but only if your browser can play it, so if a MOV file refuses to load, that is a browser limit, not a broken tool. Once the video loads, the page shows its length and file size, and a preview player appears.
Next, type the start and end seconds. If your clip is 40 seconds long and the good part runs from second 6 to second 22, type 6 as the start and 22 as the end. Then press the trim button. The tool plays that section and records it into a new video. Because it re-records in real time, processing takes about as long as the part you keep: a 16-second section takes roughly 16 seconds to build.
When it finishes, the result area shows a preview player, the before and after lengths and sizes, and a plain sentence saying what the new clip is. Watch it before you download. If the cut is off by a beat, change the seconds and trim again. Your original file is never changed.
Worked example: a six-second clip cut to three seconds
Here is a real run through the tool, so you can see exactly what comes out. The test clip was 6.0 seconds long and 86.3 KB, with picture and sound. We set the start to 1.0 second and the end to 4.0 seconds, keeping the middle three seconds and dropping the first and last second.
The tool recorded that middle section and produced a new video about 3.2 seconds long and 194.2 KB in size, saved as MP4 in Chrome. Two things are worth noticing. First, the sound survived the cut: the trimmed clip still has its audio track, because the trimmer records picture and sound together. Second, the new file is bigger than the original even though it is shorter. That is normal for a re-encoded clip: the tool records at a fixed quality setting, and file size depends on what is in the picture, not only on the length.
Good uses for a video trimmer
Cutting the dead air off the start of a screen recording is the most common use. A tutorial that begins with five seconds of fumbling becomes a tutorial that starts on the point. The same trick works at the end: stop the clip the moment the result is on screen, instead of letting it run into tidying up.
Short clips also travel better. A 45-second phone video trimmed to the 12 seconds that matter is easier to send, and it fits platforms that cap clip length. Teachers trim lectures to the one example a student asked about. In each case the goal is the same: keep the part somebody will watch, and drop the part they would skip.
Honest limitations
The output is re-encoded, not a lossless cut. The tool plays your clip and records it again, so the picture passes through a fresh round of compression. On a normal phone or screen video you will not notice the difference, but a clip that is trimmed, trimmed again, and trimmed a third time will slowly soften. For the cleanest result, always trim from the original file, not from a trimmed copy.
The output format depends on your browser, and the tool tells you the format before you start. Chrome, Edge and recent Safari save MP4. Firefox saves WebM, because Firefox cannot record MP4. WebM plays fine in Chrome, Firefox and Edge, but older Safari versions struggle with it, so check where the clip will be watched before you choose a browser for the job.
Very long videos need patience and memory. A two-hour recording takes about two hours to re-record if you keep all of it, so this tool fits short and medium clips best. If your browser runs low on memory with a huge file, close other tabs and try again.
Frequently asked questions
Does trimming remove the sound? No. The trimmer keeps the audio track for the part you keep. If you want the sound gone as well, use a video muter on the trimmed clip, or mute first and then trim.
Is the cut lossless? No. The tool re-encodes the video by recording the chosen section again. The quality stays good for everyday clips, but it is not a byte-for-byte copy of the original frames.
Why is my trimmed file bigger than the original? The tool records at one fixed quality level, and file size depends on how busy the picture is. A short clip full of movement can outweigh a longer, calmer original. Length is not the only thing that decides size.
Does my video leave my device? No. The file is read in your browser, recorded in your browser, and downloaded from your browser. Nothing is uploaded anywhere, and there is no account to sign into.
Spanish version: Recortar Video Online