Drop an MP4 or another video file, mark the range, and download the cut. The cutter runs in your browser — local files are not uploaded, and nothing to install.
People search “cut video online” and “trim MP4” when they do not want to install an editor. An online video cutter is a browser page that takes a file, a range, and returns a shorter video. CutFast’s cutter does that job in the tab: local files skip the upload queue; the export is a video file, not a blog post.
Search “cut video online” and most results want a download, an account wall, or a desktop installer. This page sends you into a browser cutter: file in, range, file out.
Works in Chrome, Edge, Safari and Firefox on a laptop or a phone. You do not wait on CapCut, Premiere or a store listing before the first trim.
A file you drop is cached in the browser and opened in the guest editor. That path does not wait on an upload bar. Pasting a URL is a separate fetch and may ask you to sign in.
Export is a clipped video you can send, upload or drop into another editor. The page is a cutter, not a tutorial.
“Trim MP4” is the same job as cutting: drop the start, drop the end, keep the middle. One URL covers both phrases so you are not bounced between lookalike pages.
Open the cutter, set the range on the timeline, download the trimmed MP4. Three steps, no project file, no timeline course.
The same flow on a laptop and on a phone browser. If the file is on the device, you can trim it without installing an app store editor.
You can open the cutter and trim a local file without buying a seat. Longer files, batch work and watermark-free paid exports live on the product plans — the first cut is not behind a paywall.
Open the cutter, mark the range, export. Nothing to install.
Go to the browser workspace and drop an MP4 (or paste a link if the file is not on this device).
Set the in and out points on the timeline. That is the trim — keep the middle, drop the rest.
Download the trimmed video and send it, post it, or drop it into another tool.
Anyone who needs a shorter file now, and does not want a desktop install for a 20-second job.
Pull the first 15 seconds off a longer take before it goes to Shorts, Reels or TikTok.
Trim the usable minute out of a recording and send the file instead of the whole capture.
School machine, borrowed laptop, or a phone: if the browser opens, the cutter opens.
Need the clip on a device frame, not just a flat file?
Video trimming shortens a clip by changing its in and out points — the first frame you keep and the last. The picture in between is unchanged. It is the basic “keep this part” edit, as opposed to splitting, merging or adding effects.
MP4 is a media container (MPEG-4 Part 14) that usually holds H.264 or H.265 video plus AAC audio. Phones, cameras and browsers all write and play it, which is why “trim MP4” is the default way people name a short, precise cut.
In-browser video editing runs the cut in the page you already have open, using the file APIs and media engines the browser ships. There is no native installer. Work can stay on-device as a blob or OPFS file, or a tool can fetch a remote URL — those are different paths.
ISO/IEC 14496-14 defines the MP4 file format as an MPEG-4 Part 14 container, the interchange format phones and browsers treat as the default video file.
ISO — MPEG-4 Part 14 (MP4) ↗The File API lets a web page read a user-selected local file in the tab without a prior server upload. Origin Private File System (OPFS) is the browser storage used to keep that media across a guest editor session.
W3C File API / MDN OPFS ↗FAQ'S
Ask us anything!
Open the browser cutter, drop the MP4, pick the range, download the file. No install.
