Video Cropper
Files
Select one video to crop. Drag handles on the preview to set the crop area.
Drop files here or
Accepted: MP4, WEBM, MKV, MOV, AVI, WMV, FLV, OGV, 3GP, M4V, TS, VOB, QT
About this Tool
Crop your videos to exact aspect ratios or custom dimensions using a highly responsive, interactive canvas. Everything is processed 100% locally in your web browser using WebAssembly (WASM), ensuring that your private videos are never uploaded to any external servers.
🔒 100% Secure Local Processing Active
This tool runs entirely on your device via WebAssembly and browser Canvas. No files are ever sent to any remote server, ensuring complete data security.
How to Crop Videos
Step 1
Upload a video file (MP4, WebM, MKV, MOV, etc.) that you want to crop.
Step 2
Adjust the crop bounding box on the preview or select a preset aspect ratio (1:1, 16:9, etc.).
Step 3
Configure output format and quality settings, click 'Crop & Save Video', and download the resulting file.
Perfect For
Social Media Layout Adjustment
Quickly crop video borders or change formats to square (1:1) for Instagram or landscape (16:9) for YouTube to ensure optimal display profiles.
Removing Black Bars & Letterboxing
Easily crop off useless black letterbox margins or padding from video clips to focus entirely on the core visual action.
Safe Corporate Video Processing
Merges, cuts, or crops sensitive presentation recordings without sending high-definition business video assets over the network.
Frequently Asked Questions
Spatial cropping requires video re-encoding (using H.264 or WebM VP9). You can select your quality preference (High, Medium, Low) to keep visual loss imperceptible.
Since conversion runs entirely inside browser WebAssembly (32-bit WASM sandboxing), files larger than 1.5GB may experience Out Of Memory (OOM) failures. We recommend processing files under 1.5GB for optimal performance.
No. The entire process runs 100% locally in your browser. Video buffers are cleared from memory immediately upon download or when you change the file.