The iPhone has a video editor built in, and most people discover its one limitation the hard way: it can shorten a clip from the ends, and that is all it can do. If the thing you want gone is in the middle — a fumbled sentence, someone walking through the shot, thirty seconds where nothing happens — Photos cannot help you, and the App Store will happily sell you a subscription to fix it.
You do not need one. Here is what the built-in editor actually does, and how to do the rest without installing anything.
What Photos can do
The trimmer is genuinely good at its job:
- Open the video in Photos and tap Edit.
- A filmstrip appears along the bottom with a handle at each end.
- Drag the left handle inward to cut off the beginning; drag the right handle inward to cut off the end. The yellow border shows what survives.
- Tap Done, then choose Save Video (overwrites the original) or Save Video as New Clip (keeps both).
Always pick Save Video as New Clip unless you are certain. The original is the only copy that has not been through an edit.
While you are in there, the Edit screen also gives you crop, rotate, straighten, exposure and colour adjustments, and — on footage you recorded in Slo-mo mode — a second slider that sets which part of the clip plays slowly. That slow-motion control is worth knowing about, but note the restriction: it only exists for video captured in Slo-mo mode. You cannot use it to slow down a section of an ordinary recording.
What Photos cannot do
Three things, and they are the three things people most often want:
- Remove a section from the middle. There is one range selector with two handles, and it defines what you keep, not what you delete. There is no “split here” and no second range.
- Change the speed of a normal video. Speed control is limited to the Slo-mo capture mode described above.
- Make more than one cut. Even if you trim, save, reopen and trim again, you are only ever moving the two ends inward — and each round trip is another export.
The reason is not technical, it is product design. Photos is a photo library with a light editor attached, not a video editor. Removing a middle section requires cutting a clip into pieces and joining them back together, which is a different mental model from “drag the ends in”, and Apple has left that to iMovie and the App Store.
The workaround people usually find, and why it is bad
The standard advice is: trim a copy to keep the first part, trim another copy to keep the second part, then join them in iMovie. It works, and there are two real costs.
Every save is a fresh export. By the time you have trimmed twice and joined once you have put the footage through multiple encodes, and each one throws away a little more detail. You have also spent a lot of taps to remove five seconds.
Doing it in the browser instead
A section removal is a single operation if the tool is built to do it. You can do it in Safari on the phone itself, with nothing installed:
- Open the editor in Safari.
- Tap the drop zone. iOS offers Photo Library, Take Video or Choose File — pick the clip from your library.
- Scrub to where the unwanted part begins. Add a Cut edit there.
- Drag the two handles to cover exactly the section you want gone, or type the start and end seconds.
- Add more cuts if there is more than one bad patch. They are all applied together.
- Tap Apply All Edits and save the result.
The part before your cut and the part after it are joined back together, so the video simply gets shorter. You do not get a gap, a freeze frame or a black flash where the cut was. And because every cut you stacked is applied in one pass, the footage is re-encoded once regardless of how many sections you removed.
Nothing is uploaded. The file is read out of your photo library into the browser tab, FFmpeg compiled to WebAssembly does the work inside that tab, and the result comes back as a download. There is no server in the path, which you can verify yourself — and it is the reason there is no upload wait, no account and no watermark.
Honest caveats for doing this on a phone
Long clips are hard work for a phone. The input file, the working buffers and the output all live in the browser tab’s memory at the same time, and iOS is aggressive about reclaiming memory from Safari tabs. Short clips — a minute or two — are comfortable. A half-hour 4K recording is where you should move to a laptop. There is more detail on the size ceiling here.
The first run downloads the engine. About 32 MB of WebAssembly is fetched the first time you apply an edit. On cellular that is a real wait; on Wi-Fi it is a few seconds. It is cached afterwards, including on later visits.
iOS may hand over an H.264 copy. Recent iPhones record HEVC by default. Depending on your settings and how you pick the file, iOS sometimes gives the browser a converted H.264 version rather than the HEVC original. Either works — it is just worth knowing the file the browser sees is not always byte-identical to the one in your library.
Capping the resolution helps a lot. If the clip is 4K and the destination is a message or a social post, setting max resolution to 720p makes the encode dramatically faster and the output much smaller. It only ever scales down.
What else you can do while you are there
Because the timeline treats every edit as a range, the same session can also speed up a slow section — which is the thing Photos genuinely cannot do to a normal recording — or slow one down. Mixing cuts and speed changes on one clip still costs a single encode.
If you would rather understand the machinery before trusting it with a recording, how browser video editing works walks through every stage from the file picker to the download link.