Video Cropper Crop videos to remove unwanted areas and change aspect ratios.

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Video Cropper

Crop videos to remove unwanted areas and change aspect ratios.

Upload Video

Drag and drop your video file or click to browse.

Select Crop Area

Drag the crop region or choose a preset aspect ratio.

Crop & Download

Click Crop and download your cropped video.

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What Is Video Cropper?

The Video Cropper is a free browser-based tool that lets you crop videos to remove unwanted areas or change aspect ratios. Select a crop region visually, choose preset ratios (16:9, 9:16, 1:1, 4:3), or enter custom dimensions. Preview the cropped result in real-time before processing. Perfect for adapting videos to different social media platform requirements — make landscape videos square for Instagram, vertical for TikTok/Reels, or wide for YouTube. The tool uses Canvas for preview and rendering, with MediaRecorder for output. All processing happens locally on your device.

Why Use Video Cropper?

Visual crop selection with real-time preview
Preset aspect ratios for social media platforms
No uploads — complete privacy on your device
No watermarks or software installation needed

Common Use Cases

Social Media Formatting

Crop landscape videos to square (1:1) for Instagram or vertical (9:16) for TikTok.

Remove Borders

Eliminate black bars, letterboxing, or unwanted border areas from recordings.

Focus Reframing

Reframe shots to highlight the most important part of the video.

Aspect Ratio Change

Convert between 16:9, 4:3, 1:1, and other aspect ratios.

Technical Guide

The Video Cropper uses the HTML5 Video element for playback and a Canvas overlay for the crop selection UI. The crop region is defined by x, y, width, and height coordinates relative to the video's native resolution. During processing, the video plays while each frame is drawn onto a Canvas using drawImage() with source and destination parameters that extract only the cropped region. The Canvas is sized to the crop dimensions, so the output matches the selected area exactly. The cropped canvas stream and audio (via Web Audio API) are fed to MediaRecorder for encoding. Preset aspect ratios are calculated based on the video's dimensions to provide commonly needed crop sizes.

Tips & Best Practices

1
Use preset aspect ratios for quick social media formatting
2
Preview the crop before processing to ensure the right area is selected
3
Cropping reduces resolution — avoid cropping very small areas from low-res videos
4
For TikTok/Reels, use the 9:16 vertical preset

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Frequently Asked Questions

Q Does cropping reduce quality?

Cropping itself doesn't reduce quality, but re-encoding may introduce minor compression artifacts. The output resolution is the crop area's dimensions.

Q What aspect ratios are available?

Presets include 16:9, 9:16, 1:1, 4:3, and custom dimensions. You can also freeform drag to any ratio.

Q Is the online video cropper private?

Yes. All processing happens in your browser — no files are uploaded to any server.

Q Can I crop and trim at the same time?

This tool focuses on cropping. Use the Video Trimmer tool first to cut the duration, then crop.

Q Does it preserve audio?

Yes, the audio track is fully preserved in the cropped video.

About This Tool

Video Cropper is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.