Recadrer la vidéo
Rogner à n'importe quel rectangle
À propos de cet outil
Crop the edges off a video by selecting a rectangular region. Useful for removing letterboxing or pillar-boxing from old footage, focusing tightly on the subject of a shot, producing square (1:1) or vertical (9:16, 4:5) clips for social platforms, or cutting out unwanted UI from a screen recording.
The crop runs in your browser with FFmpeg-WebAssembly. Audio is preserved untouched. You can enter pixel-precise coordinates or pick from common aspect-ratio presets - Privvert centers the crop automatically when you choose a preset.
Fonctionnalités
- Pixel-precise x/y/width/height crop region
- Aspect-ratio presets: 1:1 (square), 9:16 (vertical), 4:5 (Instagram), 16:9 (widescreen)
- Preserves the original audio track
- Reads MP4, MOV, MKV, WebM and most other formats
- Re-encodes with H.264 by default for compatibility
- Browser-only - nothing uploaded
- Free and unlimited
- Preset aspect ratios for vertical (9:16), square (1:1) and cinematic (2.39:1) outputs
Comment l'utiliser
- Drop in your video.
- Pick an aspect-ratio preset, or type exact x, y, width and height in pixels.
- Click Crop.
- Download the cropped video.
Tout se passe dans votre navigateur grâce à JavaScript et WebAssembly. Vos fichiers ne sont jamais téléversés, jamais stockés et jamais vus par nous.
Questions fréquentes
Cropping itself is mathematically lossless, but the video has to be re-encoded so there's a small generational quality loss. Use a high CRF (lower number) or bitrate to minimize it.
FFmpeg requires width and height to be multiples of 2 for most codecs. The tool rounds down automatically if needed.
Only rectangular crops - that's a hardware codec limitation. For a circular video, render with a mask in a video editor.
No - audio is copied through unchanged.
Yes, because the frame dimensions change. The encoder uses sensible defaults that keep quality close to the original; for archival use, pick a higher quality preset.
No - video frames are always rectangular. For rounded corners or masks, overlay the rectangular crop onto a transparent shape in a video editor.