Can I turn a landscape video into a portrait video?
Resize keeps the original proportions and has no portrait or square presets. To change a 16:9 composition to 9:16 or 1:1, crop the frame first, then resize the downloaded crop if needed.
Browser video tool
Resize video for any platform
Prepare AI-generated or uploaded clips for TikTok, Reels, Shorts, websites, and product pages.
Upload a video to resize
MP4, MOV, or WebM. Up to 5 minutes and 300MB.
How to resize a video without stretching it
1. Choose an MP4, MOV, or WebM file. The controls start at 100% of the source dimensions. Use resize when you want a smaller or larger version of the complete frame.
2. Change Scale, Width or Height. The controls stay linked to the original aspect ratio: for example, a 1920 × 1080 clip at 50% becomes 960 × 540. Scale ranges from 1% to 200%.
3. Select Resize video, preview the MP4 and download it. Check the resulting dimensions before publishing; width or height input is converted to a whole percentage, and export rounds dimensions to even pixels.
When to resize a video
Lighter files for the web
Scale a 4K or 1080p clip down for a website background or landing page so it loads faster. See how to make a looping video background for a website.
Match an upload width
Fit the width a platform, CMS or ad slot expects without changing the composition of the frame.
Faster loops and smaller GIFs
Lower resolution makes browser processing quicker. For GIFs, the video to GIF converter can also set its own width.
Enlarge a small clip
Go up to 200% when a layout needs bigger dimensions. Upscaling makes the picture larger but does not add detail.
Common sizes from a 1080p clip
Resize keeps the source's proportions, so you choose a scale rather than a new shape. Scale is a whole percentage and the export rounds to even pixels, so some standard sizes land a few pixels off. This is what a 1920 × 1080 landscape clip becomes:
| Target | Scale | Exported size |
|---|---|---|
| 4K UHD (3840 × 2160) | 200% | 3840 × 2160 |
| Full HD 1080p | 100% | 1920 × 1080 |
| HD 720p (1280 × 720) | 67% | 1286 × 724 |
| qHD 540p | 50% | 960 × 540 |
| 360p (640 × 360) | 33% | 634 × 356 |
| Small preview | 25% | 480 × 270 |
Resize, crop, or both?
Resize
Changes the size of the whole picture and keeps every part of the frame. Use it to make a file lighter or to match a width.
Crop
Cuts away the edges and can change the shape, for example landscape to 9:16. Use crop video for that.
Both
For a vertical Reel from landscape footage, crop to 9:16 first, then resize the crop to about 1080 × 1920.
Check before exporting
The target size appears under the preview as source → result, so you can confirm the numbers before you select Resize video.
After resizing
If the clip will play on repeat, as a background, a Story or a product loop, make it loop seamlessly with AI on the LoopVideo homepage so the restart has no visible jump. AI requires sign-in, and email accounts must be verified. The one-time free trial adds a visible LoopVideo watermark, and one paid credit gives a watermark-free result.
- How to make a video loop seamlesslyThe full workflow from preparing a clip to an AI seamless loop.
- How to loop a video on InstagramSize and loop clips for Stories and Reels.
- How to make a video longerRepeat, slow down or reverse a short clip without re-shooting.
FAQ
Will the exported size exactly match the number I enter?
Not always. Width and Height are converted to a whole-number scale between 1% and 200%, then the encoded dimensions are rounded to even pixels. Actual dimensions can differ slightly from your input; the image is not independently stretched in each direction.
Does resizing improve quality or guarantee a smaller file?
Upscaling makes a larger image but does not recover missing detail. Reducing dimensions often reduces file size, but output also depends on the source and re-encoding. This tool has no target file-size or bitrate control.
What files and devices can I use?
Choose MP4, MOV or WebM up to 300MB and 5 minutes. Files over 100MB or clips over 60 seconds trigger a performance warning. Codec support and available browser memory affect success, particularly on mobile. Processing is local, free and requires no login or credits.
What resolution should a website background video use?
For a full-width hero, 1920 pixels wide is usually enough, and smaller sections need less. A short, muted clip at a modest size loads much faster than a 4K original. The LoopVideo blog guide to looping video backgrounds covers the HTML as well.
Does resizing change the length or speed?
No. Resizing changes only the picture dimensions; duration and playback speed stay the same. Use the change video speed tool to change timing.
Can I resize a vertical video?
Yes. The same controls work in any orientation. For example, a 1080 × 1920 clip at 50% becomes 540 × 960.