How do I crop the visual area or aspect ratio of a video?

Upload your video, drag the crop box on the video canvas or select a social preset (1:1 Instagram, 9:16 TikTok/Reels/Shorts, 16:9 YouTube, 4:5 Feed), and click 'Crop Video'.

Can I convert horizontal 16:9 video to vertical 9:16 for TikTok and Reels?

Yes. Select the 9:16 portrait preset and center the crop window over the main subject to create vertical video clips.

Does cropping a video keep the audio in sync?

Yes. Audio streams remain perfectly synchronized with the cropped video frames during export.

NexLove Media

Video Cropper — Crop Video Aspect Ratio & Area

Crop video dimensions to 16:9 widescreen, 1:1 square for Instagram, 9:16 vertical for TikTok/Reels, or custom rectangular viewports.

TL;DR: Video Cropper — Crop Video Aspect Ratio & Area is a 100% free browser-based media utility. Crop video framing to square, vertical, or widescreen aspect ratios in your browser.

Select Video to Crop

Supports MP4, WebM, MOV, MKV files

Understanding Video Cropper — Crop Video Aspect Ratio & Area

Crop video dimensions to 16:9 widescreen, 1:1 square for Instagram, 9:16 vertical for TikTok/Reels, or custom rectangular viewports. Designed for creators, video editors, audio engineers, web designers, and developers who need instant, high-precision processing without software installation, watermarks, or file uploads.

Mathematical Formula & Technical Methodology

\text{AR} = \frac{W_{\text{crop}}}{H_{\text{crop}}} \in \{ 1:1, 16:9, 9:16, 4:5 \}

Formula Variables Explained:
Re-samples video stream viewport coordinates onto standard social media aspect ratios.

Step-by-Step Worked Example

Cropping a 1920x1080 16:9 video to 1080x1080 produces a 1:1 square video.

100% Client-Side Privacy Guarantee

All media decoding, manipulation, calculations, and encoding execute locally inside your web browser using HTML5 Canvas, Web Audio API, WebCodecs, Web Crypto, and modern JavaScript engines. Zero server uploads, zero telemetry, and no registration required.

Frequently Asked Questions

: Upload your video, drag the crop box on the video canvas or select a social preset (1:1 Instagram, 9:16 TikTok/Reels/Shorts, 16:9 YouTube, 4:5 Feed), and click 'Crop Video'.
: Yes. Select the 9:16 portrait preset and center the crop window over the main subject to create vertical video clips.
: Yes. Audio streams remain perfectly synchronized with the cropped video frames during export.

Embed This Tool

Add the live Video Cropper — Crop Video Aspect Ratio & Area to your own website with this embed code:

<iframe src="https://nexlove.org/embed/video-cropper.html" width="100%" height="650" style="border:1px solid #e2e8f0;border-radius:12px" title="Video Cropper — Crop Video Aspect Ratio & Area — NexLove" loading="lazy"></iframe>

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