Resize Video Online
Change video width, height, and resolution online. Preserve the original proportions or enter custom dimensions for MP4, MOV, AVI, WebM, and MKV files.
Resize Your Video with an Online Editor
Upload a video, choose a common resolution or enter an exact width and height. Keep the original aspect ratio locked when you want to resize without changing the proportions of people and objects.
Resize changes the output dimensions. It does not select a smaller part of the picture like Crop Video, and it does not guarantee a smaller file like video compression.
How to Resize Video Online
Video dimensions are measured in pixels, such as 1920 × 1080 or 1280 × 720. The first number is width and the second is height. Lower dimensions contain fewer pixels, while larger dimensions do not add detail that was missing from a low-resolution source.
Step-by-step
- Upload the video you want to resize.
- Review the original dimensions shown under Current size.
- Choose a preset or enter a custom width and height.
- Keep Preserve proportions enabled to avoid stretching.
- Preview the target frame and click Resize video.
- Download the resized video.
Choose dimensions carefully
- 1920 × 1080: Full HD landscape output.
- 1280 × 720: smaller HD landscape output.
- 1080 × 1920: vertical 9:16 frame.
- 1080 × 1080: square 1:1 frame.
- 1080 × 1350: portrait 4:5 frame.
Preserve the Original Aspect Ratio
Aspect ratio describes the shape of the frame, such as 16:9, 9:16, 1:1, or 4:5. Keeping it locked means that changing the width automatically recalculates the height, and changing the height recalculates the width. This prevents faces, text, and objects from becoming unnaturally wide or narrow.
Unlock the ratio only when you intentionally need independent dimensions. If the target shape differs from the source, inspect the result carefully. Use Crop Video when you want to remove edges and reframe the picture instead of changing its proportions.
Resize while keeping proportions
- Create a smaller HD version of a Full HD or 4K source.
- Match a required width while calculating the correct height.
- Prepare consistent dimensions for presentations or editing.
- Avoid geometric distortion in people, logos, and text.
Changing shape needs another decision
Turning a horizontal video into a vertical one may require cropping, repositioning, or adding background space. Exact dimensions alone cannot decide which part of the original picture should remain visible.
Resolution, Aspect Ratio, and File Size Are Different
Resolution describes pixel dimensions. Aspect ratio describes frame shape. File size depends on duration, resolution, bitrate, codec, frame rate, audio, and other encoding settings. Reducing resolution can reduce the amount of image data, but it does not guarantee a particular file size.
Downscaling
Reducing dimensions can make a large video easier to display or process. Some fine detail is removed because the output contains fewer pixels.
Upscaling
Increasing dimensions creates more output pixels but cannot restore detail that was not present in the source. Excessive upscaling may look soft or pixelated.
Resize, Crop, or Compress video?
Resize Video
Change the pixel dimensions or resolution of the output frame.
Crop Video
Remove outer parts of the picture and choose which area remains visible.
Compress Video
Focus on reducing file size rather than only changing width and height.
Supported Video Formats
The uploader accepts common formats including MP4, MOV, AVI, WebM, and MKV. Resizing creates a newly processed file, so quality and file size can change. For the most predictable result, avoid enlarging a source far beyond its original resolution and review the downloaded video before publishing it.
Need to Edit Your Video?
Reframe the resized video, position it on a vertical or square canvas, add a background, trim the clip, or add text, subtitles and other elements.
Learn More About Resizing Video
Frequently Asked Questions
Common questions about resizing videos online.
Can I resize video online for free?
Yes. You can upload a video, choose new pixel dimensions, and create a resized result online without installing desktop software.
Will resizing reduce video quality?
Resizing creates a newly processed file. Downscaling removes pixel detail, while upscaling cannot create missing source detail and may look soft. Choose dimensions appropriate for the original video.
What video formats can be resized?
The uploader accepts common formats including MP4, MOV, AVI, WebM, and MKV. Files that cannot play directly in the browser may need preparation before preview.
Can I resize videos for social media?
Yes. You can create landscape, vertical, square, or portrait dimensions. Platform requirements can change, so verify the current specification before publishing.
Can I change the aspect ratio of a video?
Yes. Unlock Preserve proportions to enter independent width and height values. This can distort the picture, so use Crop Video or the full editor when you need to change the frame shape without stretching the subject.
Does resizing make a video file smaller?
Not always. Resolution affects file size, but duration, bitrate, codec, frame rate, and audio also matter. Use Compress Video when a smaller file is the main goal.
Can resizing improve a low-resolution video?
Increasing width and height creates a larger frame, but it cannot restore detail missing from the source. Large upscaling may make the result appear blurred or pixelated.