Redimensionner la vidéo
1080p, 720p, personnalisé
À propos de cet outil
Resize a video to a target resolution - 4K, 1080p, 720p, 480p or any custom width/height. Useful for hitting platform upload limits (some services cap at 1080p), saving bandwidth when sharing, fitting older devices that can't decode 4K, or batch-shrinking a folder of clips before archiving.
Privvert keeps aspect ratio by default so you don't end up with squashed footage. Resizing runs in your browser with FFmpeg-WebAssembly - your video is never uploaded, even when it's a private project file.
Fonctionnalités
- Common presets: 4K, 1440p, 1080p, 720p, 480p
- Custom width and height
- Preserve aspect ratio toggle
- High-quality Lanczos resampling
- Reads MP4, MOV, MKV, WebM and most other formats
- Browser-only - files never leave your device
- Free and unlimited
- Snap to common targets like 1080p, 720p and 480p
Comment l'utiliser
- Drop in your video.
- Pick a resolution preset, or type a custom width/height.
- Click Resize.
- Download the resized 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
Almost always yes - fewer pixels means less data to encode at the same quality setting. A 4K → 1080p resize typically shrinks files by 60-75%.
No. Upscaling can only interpolate; it can't invent detail that isn't there. The output is a smoother but no-sharper version of the input.
1080p (1920×1080) is the sweet spot for desktop quality without huge file sizes. 720p (1280×720) is a safe upload target for everywhere.
Yes - keep 'preserve aspect ratio' on. The tool resizes to fit within your target dimensions without stretching.
Downsizing usually gives a sharper-looking result than the original at the new size, because high-frequency detail is averaged out. Upsizing can't invent detail and just makes the existing pixels bigger, sometimes with a slight smoothing pass.
1080×1920 for vertical (Reels, TikTok, Shorts), 1080×1080 for square, 1920×1080 for standard horizontal. The presets in the tool match these defaults.