How do I crop for social media platforms?

Use the preset aspect ratios: 9:16 (1080x1920) for Instagram Reels, TikTok, YouTube Shorts; 1:1 (1080x1080) for Instagram posts; 16:9 (1920x1080) for YouTube landscape. Position the crop area to center your subject, then download the optimized video ready for upload.

Video Crop Tool - Trim Video Frames Online

Crop videos to any aspect ratio in your browser. Visual selection with 16:9, 1:1, 9:16 presets. Uses FFmpeg, no uploads, completely private.

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Frequently Asked Questions

Video cropping removes unwanted portions from the edges of a video frame, allowing you to focus on a specific area, change aspect ratios, or remove letterboxing. Unlike trimming which cuts video length, cropping modifies the frame dimensions while keeping the duration unchanged.

Crop videos to reframe content for different platforms (vertical for TikTok, square for Instagram), remove watermarks or black bars, focus on specific subjects, or fix poorly framed footage. Cropping is essential when repurposing landscape videos for portrait mobile formats.

This tool supports common aspect ratios including 16:9 (widescreen, YouTube), 4:3 (traditional TV), 1:1 (square for Instagram posts), 9:16 (vertical for TikTok, Reels, Stories), plus freeform custom dimensions. You can visually adjust the crop area or enter exact pixel dimensions.

Cropping itself doesn't reduce quality - it simply selects a portion of the original frame. However, if you crop to a small area and then scale it up, you may see quality loss. For best results, crop to your target resolution without upscaling beyond the source dimensions.

This tool uses FFmpeg.wasm, a WebAssembly port of FFmpeg running entirely in your browser. The crop filter (crop=width:height:x:y) extracts the selected rectangular region from each frame. Processing happens locally with no server uploads, ensuring privacy and speed.

FFmpeg supports virtually all video formats including MP4, MOV, AVI, MKV, WebM, FLV, and more. The output is saved as MP4 (H.264 codec) for maximum compatibility across devices and platforms. Original audio tracks are preserved in the cropped video.

Yes, cropping typically reduces file size since fewer pixels are encoded in each frame. A 1920x1080 video cropped to 1080x1080 (square) will be roughly 56% of the original size. Exact reduction depends on the crop area and video content complexity.

Browser-based processing works best with videos under 500MB and 10 minutes. Larger files may cause memory issues depending on your device. For very large files, consider using desktop FFmpeg or online services with chunked processing. All processing happens locally in your browser.

Browser-based video processing using WebAssembly is significantly slower than native desktop applications (typically 10-50x slower). This tool is ideal for quick edits when you don't have video editing software installed, or for privacy-sensitive videos you don't want to upload. For professional or frequent video editing, we recommend desktop tools like FFmpeg, HandBrake, or DaVinci Resolve.

Video Crop Tool - Trim Video Frames Online

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Crop Area Selection

Cropped Video

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