MP4 File Trimmer

Our simple mp4 trimmer lets you edit mp4 files right in your web browser!

Trim your MP4 files

Need to change the beginning or ending of an mp4 video? Our mp4 online trimmer lets you trim videos right in your browser, without having to download or install anything! Just upload your file and drag on its edges to trim it. 

MP4 File Trimmer

Trim and Crop MP4 files 

Flixier can do more than just trim! Our online tool also lets you crop videos and even add images, transitions and animated text and titles, all with a fast and easy to use interface!

Trim any video format

Got a video that isn’t an MP4? No need to worry about converting! Flixier supports all major video formats so you can trim MKV files, MOV files, AVI files and more!

Compress your MP4 videos

Are your video files too large for social media or messaging apps? You can use Flixier to trim and compress them in a matter of seconds, without sacrificing video or audio quality!

Generate subtitles and voice overs

Flixier lets you add automatically-generated subtitles and even professional sounding voice overs to your MP4 videos with just one click! 

How to trim an MP4 file online:

How to trim an MP4 file online:

Log into your Flixier account and click the blue Import button to add the MP4 file to your library. You can drag it over from your own computer, or bring it over from Google Photos, Dropbox and other cloud storage services!


To trim your file, create a new project and drag the file down to the Timeline. Then, use the mouse button to drag on its left and right edges and change when your clip starts and ends!


Once you’re done trimming your MP4 file, click the blue export button to start rendering. You can also choose to publish your file to up to 7 different online destinations, all at once! Rendering your final video will only take a couple of minutes and then you will be able to save it to your computer as well!

Why use Flixier to trim MP4 videos online:

Trim videos easily 

Flixier is a simple MP4 trimmer, meaning you don’t need any previous video editing experience  to trim your clips! You can trim videos with your mouse in just a couple of clicks!

Trim MP4 videos fast

Our online trimmer is cloud-powered and renders videos at lightning speed, so your trimmer videos will always be ready for you to download and share online in 3 minutes or less! 

Trim and edit videos on anything

Our online video editor is browser based and runs smoothly on any computer, so you can trim your MP4 videos on Macs, Windows laptops and Chromebooks!

Try before you buy 

Our free MP4 trimmer offers most of the same features as the paid versions, so you don’t have to spend anything in order to use it unless you’re ready to!


I’ve been looking for a solution like Flixier for years. Now that my virtual team and I can edit projects together on the cloud with Flixier, it tripled my company’s video output! Super easy to use and unbelievably quick exports.

Steve Mastroianni -

My main criteria for an editor was that the interface is familiar and most importantly that the renders were in the cloud and super fast. Flixier more than delivered in both. I've now been using it daily to edit Facebook videos for my 1M follower page.

Evgeni Kogan

I'm so relieved I found Flixier. I have a YouTube channel with over 700k subscribers and Flixier allows me to collaborate seamlessly with my team, they can work from any device at any time plus, renders are cloud powered and super super fast on any computer.

Anja Winter, Owner, LearnGermanWithAnja

Frequently asked questions.

Frequently Asked Questions

If you have any further questions, Get in touch with our friendly team
If you have any further questions, Get in touch with our friendly team

How can I trim a video fast?

How can I trim a video fast?

To trim a video fast, just log into Flixier, drag your video over to the Library, double click on it and drag on its edges in the Timeline to remove things from the beginning or end of the clip! 

Can I trim a video on Windows 10 or Mac?

Can I trim a video on Windows 10 or Mac?

Of course! With Flixier, you can trim videos on any computer, doesn’t matter if it’s a Mac, a Windows 10 laptop or a Chromebook or Linux machine! Just open up your favorite web browser and log into Flixier for all your video editing needs! 

How do you reduce the length of a video?

How do you reduce the length of a video?

Also known as trimming, you can reduce the length of a video in Flixier by dragging on the edges of it in the Timeline using your left mouse button.

How do you reduce the length of a video?

How do you reduce the length of a video?

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