Crop Video Online Free

Crop video is the right tool when the timing of a clip is already useful but the frame includes too much. Screen recordings often contain a full desktop even though the viewer only needs one app window. Phone footage may include floor, ceiling, or side space that distracts from the subject. Meeting exports can arrive with black borders around slides, and product demos can show browser chrome that should not be part of the final clip. Choose a video, use the preview crop box to set the visible area, adjust the pixel values or aspect preset, then export a cropped MP4 in the browser.

1. 1

   Choose a local video

   Select an MP4, MOV, WebM, or another browser-readable video. The tool reads the source dimensions and duration so the crop controls can stay inside the real frame.

2. 2

   Set the crop box

   Drag the crop box on the preview for a quick reframing, or enter X, Y, width, and height when you need exact pixels. Use square, 16:9, 9:16, and 4:5 presets when the destination expects a familiar aspect ratio.

3. 3

   Export and inspect the MP4

   Run the conversion, keep the tab open while FFmpeg crops and encodes the file, then preview the cropped MP4. Check both the center content and the edges before downloading.

Cropping is one of the fastest ways to make a video feel intentional. A loose frame forces the viewer to decide where to look, while a clean crop points attention at the action. In product work, that may mean focusing on the interface state instead of the whole monitor. In education, it may mean filling the frame with slides or handwriting. In social media, it may mean turning a horizontal source into a vertical story without making the subject tiny. The crop video workflow is also useful for privacy because it can remove areas of the frame that should never have been recorded, such as browser tabs, desktop icons, adjacent chats, or parts of a room.

This page is deliberately more exact than a simple resize tool. Resize changes the output dimensions of the whole picture; crop removes pixels from the edges and creates a new composition. That distinction matters when text readability, subject placement, or platform framing is important. The tool keeps the crop box visible, exposes pixel values, and exports an H.264 MP4 with even dimensions so the result plays reliably in browsers, phones, learning systems, help desks, and social uploaders. Because the work happens through browser FFmpeg, you can test a crop before uploading the result anywhere else.

The crop area is defined by four pixel values: X is the distance from the left edge, Y is the distance from the top edge, width is the visible output width, and height is the visible output height. The visual crop box changes those values when you drag it. Aspect presets help you start from square, widescreen, vertical, or 4:5 framing, but you can still edit the numbers after choosing a preset. CRF controls the MP4 quality and size; the encoding preset controls speed. Keeping audio is useful when speech or natural sound still belongs with the cropped picture.

After export, play the entire result once. Watch the edges first: captions, subtitles, mouse cursors, UI buttons, hands, faces, and product labels are easy to cut off accidentally. Then check the center composition. If the subject feels cramped, increase the crop width or height slightly. If the file is for a platform with a fixed layout, preview it in that destination before deleting the source. Cropping cannot recover pixels outside the selected area, so keep the original until the cropped MP4 is accepted.

• Keep the crop width and height large enough for the destination so text, UI details, and faces stay readable.
• Use CRF 23 for a balanced MP4, lower it for sharper output, or raise it only when file size matters more.
• After exporting, watch the edges of the cropped result to catch accidental cut-off captions, cursors, buttons, or hands.

The selected file is processed by FFmpeg running inside your browser. The normal workflow does not require a server upload or an account. This local-first behavior is helpful when the source contains work dashboards, customer information, classroom material, private rooms, or unreleased product views. Cropping can remove visible areas that should not be shared, but it only removes the parts outside the selected rectangle.

Anything inside the crop area remains visible and audible if audio is kept. Names, emails, API keys, account numbers, faces, addresses, license plates, and background speech can still appear in the result. If sensitive content is inside the frame, crop a different area, mute the video, blur it in a dedicated editor, or remake the recording. Treat cropping as a framing and reduction step, not as complete redaction.

Use a full editor when the crop needs to move during the clip, when you need to follow a face or pointer, when different moments need different frames, or when overlays, captions, blur, and color work are part of the same job. Browser FFmpeg can be memory-heavy with long 4K videos because it must decode and encode the clip locally. For important work, test a short clip first, confirm the crop dimensions, then process the final source.

• You need animated pan-and-scan reframing, masks, face tracking, or different crop boxes at different moments.
• The video is very long or high resolution and your browser does not have enough memory for local FFmpeg processing.