Crop Video Online
Drag a box over the part of the picture you want to keep and cut everything else away. Lock it to a delivery ratio or drag any shape you like — the tool shows how much of the picture the box discards before you commit, and the whole thing runs in this tab without uploading anything.
Cropping is a decision, not a setting
Every crop throws part of the picture away permanently, and the only question worth asking is which part. That sounds obvious until you upload a landscape clip somewhere vertical and let the platform decide: it will take the middle, because the middle is the only defensible guess a machine can make about footage it has never seen. Your subject is rarely dead centre.
So the box here is deliberately the main control, with a thirds grid over it, and the panel reports the share of the picture it is discarding as you drag. Going from 16:9 to 9:16 loses about two-thirds of the width — that number is not a warning about a mistake, it is simply what those two shapes cost each other, and it is better known before the export than after it.
If nothing can be lost, crop is the wrong tool for the job. The resize tool will fit the whole picture into a delivery frame with bars instead, and it shows exactly how thick those bars will be.
Why the output can be smaller than you expect
A crop is measured in the source's own pixels. Take a 600 × 600 box out of a 1920 × 1080 clip and the result is a 600 × 600 video — not a 1080p one — because those are the only pixels that existed inside the box. That is why "Cropped size" is the default: it is the one option that neither invents detail nor throws any away.
The scale options exist for when a platform wants a specific frame. They keep the box's shape and stretch the long edge to the number you pick, and the tool warns you when that means enlarging rather than shrinking, because no encoder adds detail that was not in the source — an enlarged video is just a softer, bigger file. The resolution calculator does this arithmetic on its own if you want to check a number before loading a file.
Frequently asked questions
How do I crop a video without downloading software?
Drop the file on this page, drag the box over the part you want to keep, and press Crop video. The whole thing runs on the video encoder built into your browser, so there is no installer, no account and no upload — the file is read from your disk and written back to it without ever reaching a server.
Does cropping reduce the quality of my video?
Cropping cannot be done without decoding and re-encoding every frame, so there is some loss, but it runs on your device's own hardware encoder at a high quality setting and it is normally invisible. What changes far more noticeably is the resolution: a small box cropped out of a 1080p clip is a small video, which is why the output size control lets you scale it back up or leave the cropped pixels exactly as they are.
Can I crop to a specific aspect ratio?
Yes — pick one of the ratio locks and the box will only ever hold that shape, however you drag it. 9:16 for Reels, Shorts and TikTok, 1:1 for square feed posts, 4:5 for Instagram portrait, plus 4:3 and 16:9. Leave it on Free to drag any shape at all, which is what you want when the crop is about removing something rather than hitting a delivery frame.
What is the difference between cropping and resizing?
Cropping removes part of the picture; resizing changes how many pixels the picture is drawn with. They are often done together — cropping a 16:9 clip to 9:16 and then scaling the result to 1080 × 1920 is one export — but the questions are different. This page asks which region you want; the resize tool asks which frame you need and then works out what to do about the shape difference.
Can I crop out a watermark or a logo?
Only if it sits near an edge, because a crop can only remove a rectangle from the outside in. Dragging the box inside the offending corner works; something in the middle of the frame cannot be cropped away without taking the picture with it. This tool does not remove or paint over anything inside the box.
Which formats and browsers does this work with?
MP4, MOV, MKV and WebM go in, up to 2 GB. Output is MP4 (H.264), or WebM (VP9) on a browser without an H.264 encoder. AVI, WMV, FLV and MPG are the exception — the browser's built-in video engine has no reader for them, so convert one to MP4 first and crop that. It needs a browser with WebCodecs: current Chrome, Edge, Safari and Firefox all qualify.
Is there a limit on how small the crop can be?
The box will not go below 16 pixels on either side, and both its size and its position are snapped to even numbers. That is not an arbitrary limit: the colour information in an H.264 or VP9 file is stored at half resolution on both axes, so an odd offset shifts colour half a pixel against the picture and puts a visible fringe along high-contrast edges.