You draw it, it crops it
The box you drag on the frame is the crop — no numeric fields to guess at, and the area outside it dims so you can see the result before running anything. The page shows the exact output pixel size as you drag.
Video Cropper
ViralMint is a free, local video cropper. Drag a box over the frame, pick a shape if you want one, and keep exactly the part you chose.
Free and unlimited — no account, no watermark, and the file never leaves your browser. Big files and batch runs are faster in the desktop app.
Why ViralMint for this
Shape presets that are actually square
Pick 9:16, 1:1 or 16:9 and the box locks to that ratio in real pixels. This sounds obvious and often isn't: a box that looks square on a 16:9 preview isn't square in the output, which is why '1:1' crops from some tools come out subtly rectangular.
Your audio is left alone
Cropping is a picture operation, so the audio track is copied across rather than re-encoded. You lose nothing in sound quality, and the job finishes faster.
How it works
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Open Crop Video
Launch the ViralMint desktop app, open Tools, and choose Crop Video.
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Add your video
Drop in an MP4, MOV, MKV or WEBM file, or pick one from your Library.
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Choose a shape
Pick 9:16 for TikTok and Reels, 1:1 for feed posts, 16:9 for YouTube — or Free to draw any rectangle.
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Drag the crop box
Drag across the frame. Everything outside the box dims, and the exact output size in pixels is shown beneath it.
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Crop and download
Click Crop. The video is re-encoded once, the audio is copied, and the result is ready to download.
Frequently asked
What is the difference between cropping and reframing?
Cropping keeps exactly the rectangle you drew. Reframing is automatic — ViralMint's Reframe to Vertical tool tracks faces and moves the crop window through the video so a speaker stays centred. Use crop when you know what you want to keep; use reframe when the subject moves.
Does cropping reduce the file size?
Usually yes, since there are fewer pixels to encode, but that is a side effect rather than the point. If your goal is a smaller file at the same framing, use the Video Compressor instead.
Can I crop a vertical video?
Yes. The shape presets work from whichever dimension makes sense for the source, so a 1080x1920 vertical clip crops to a true square or a 16:9 letterbox just as a landscape one does.
Will the output play everywhere?
Yes. The crop is rounded to even pixel dimensions and offsets, which H.264 requires — a detail that quietly breaks encodes in tools that skip it — and the result is a standard MP4.
Get ViralMint
The Video Cropper ships inside the free ViralMint desktop app — no subscription, no watermark, no per-minute cap. Download once, use on as many videos as you want.