What is the difference between 4K, 1080p, and 720p?

4K (3840x2160) has four times the pixels of 1080p — ideal for large displays and future-proofing. 1080p (1920x1080) is the standard for most content — sharp on any screen up to 27 inches. 720p (1280x720) is HD — sufficient for mobile viewing and significantly smaller file sizes.

What is the difference between upscaling and downscaling?

Downscaling (e.g., 4K to 1080p) removes pixels and generally looks great — you are discarding detail the smaller display cannot show. Upscaling (e.g., 720p to 4K) adds pixels through interpolation and cannot add real detail — the result looks the same or slightly softer. Always prefer downscaling over upscaling.

What is the best resolution for social media?

YouTube: 1080p or 4K for best quality. Instagram Reels/TikTok: 1080x1920 (9:16 vertical). Twitter/X: 1280x720 minimum. Facebook: 1080p. For most social platforms, 1080p provides the best balance of quality and upload speed.

Is the aspect ratio preserved when changing resolution?

Yes. The tool maintains the original aspect ratio by default when you select a target resolution. This prevents stretching or squishing. If you need a different aspect ratio, use the Video Crop tool to adjust the frame first.

Video Resolution Changer

Change video resolution — downscale 4K to 1080p, 720p, or 480p. Resize for social media, email, or web — all processed in your browser.

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Comment utiliser — Video Resolution Changer

Upload your video

Drag and drop any video file (MP4, WebM, MOV, AVI) or click to browse. The video loads locally in your browser.

Select target resolution

Choose from presets (4K, 1080p, 720p, 480p) or enter a custom resolution. Aspect ratio is preserved automatically.

Resize and download

Click "Change Resolution" to process. The video is re-encoded at the new resolution. Download when complete.

Questions Fréquentes

4K vs 1080p vs 720p — what should I choose?

4K for large displays and future-proofing. 1080p is the standard for most content — sharp up to 27-inch screens. 720p for mobile viewing and smaller file sizes.

Upscaling vs downscaling — which is better?

Downscaling (4K to 1080p) always looks great — you discard detail the smaller display cannot show. Upscaling (720p to 4K) cannot add real detail and may look softer. Always prefer downscaling.

Best resolution for social media?

YouTube: 1080p or 4K. Instagram/TikTok: 1080x1920 vertical. Twitter: 1280x720 minimum. For most platforms, 1080p is the best balance of quality and upload speed.

Is the aspect ratio preserved?

Yes. The tool maintains the original aspect ratio by default, preventing stretching. Use the Video Crop tool first if you need a different aspect ratio.