CanDoYa
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Crop Video Online

Runs entirely in your browser - no upload, no sign-up.

Choose a video and frame the area you want to keep

Your source and cropped video stay in this browser tab. The video is never uploaded.

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How do you crop a video online?

To crop a video, choose a local file, place the frame over the part you want to keep, and export a new MP4. Presets create square, portrait, or landscape frames, while pixel fields give exact control. Processing happens in your browser, so the source is not uploaded.

How to use

  1. 1Choose a video. Drop an MP4, WebM, MOV, MKV, AVI, MPEG, or another common video file into the cropper.
  2. 2Frame the area to keep. Choose an aspect ratio, drag the crop frame, resize its corner, or enter exact left, top, width, and height values.
  3. 3Crop in your browser. Start the local export and keep this tab open while the video is decoded and re-encoded on your device.
  4. 4Preview and download. Check the cropped result, change the frame if needed, then download the watermark-free MP4.

Who it's for

This video cropper removes pixels outside one rectangular area for every frame. It does not trim the timeline or stretch the picture. Choose Original to keep the whole frame, or use 16:9, 9:16, 1:1, 4:5, and 4:3 presets for familiar publishing shapes.

The tool loads a WebAssembly build of FFmpeg only when you export. It re-encodes the video as H.264 MP4 and keeps the first audio track as AAC when one exists. Subtitles, chapters, attachments, and source metadata are not copied. Browser memory and processor speed make the tool best for short or moderate clips. The conservative limit is 100 MB on mobile or lower-memory devices, 250 MB on a typical desktop, and 500 MB on high-memory desktops.

FAQ

Is my video uploaded when I crop it?

No. The browser reads your selected file and a WebAssembly video engine creates the result in this tab. The engine code downloads when first needed, but your source video and cropped output are not sent to CanDoYa or stored in an account.

Is this video cropper free and watermark-free?

Yes. You can set the crop area, process the video, and download the MP4 without an account, subscription, credit limit, or watermark. The practical limits come from your device's available memory and processing speed rather than a paid server export tier.

How large a video can I crop in the browser?

The conservative limit is 100 MB on mobile or lower-memory devices, 250 MB on a typical desktop, and 500 MB on high-memory desktops. A file near the limit can still be slow because the browser holds the source, video engine, working data, and result in memory.

Can I crop a video to 9:16 for TikTok or Reels?

Yes. Choose the 9:16 preset to create a centered vertical frame, then drag it over the subject. The same editor includes 1:1 for square posts, 4:5 for portrait feeds, 16:9 for landscape video, and exact custom pixel controls.

Does cropping a video shorten its duration?

No. Cropping changes the visible frame dimensions but keeps the full timeline. To remove time from the beginning, middle, or end, use a video trimmer instead. A crop and a trim solve different editing tasks even though both remove unwanted material.

Will the cropped video keep its audio?

Yes, when the source has a readable audio track. The exporter crops and re-encodes the picture, then places the first audio stream into the MP4 as AAC. Sources without audio remain silent. Extra audio tracks, subtitles, chapters, and attachments are not copied.

Why can cropping a large video take several minutes?

Every frame must be decoded, cropped, and encoded again on your device. Long duration, 4K dimensions, an uncommon source codec, and limited memory all increase processing time. Keep the tab open, close other heavy tabs, and use a desktop editor for long or very large projects.

Which video formats can the cropper open?

It accepts common containers such as MP4, WebM, MOV, MKV, AVI, MPEG, WMV, MTS, and related video files, then exports MP4. Browser preview support is narrower than FFmpeg support, so a damaged or uncommon professional codec may need conversion or desktop software first.