How to resize a video for social media
Every platform has a favorite shape: tall 9:16 for TikTok, Reels and Shorts, square or 4:5 for the Instagram feed, and wide 16:9 for YouTube. Upload the wrong shape and the app crops it for you, often cutting off heads or text. This tool reshapes your video the way you choose, either by cropping or by fitting it on a blurred background, right in your browser.
- 1
Add your video
Drop in an MP4, MOV or WebM file up to 10 minutes long. The preview shows the video in its current shape.
- 2
Pick a shape
Choose 9:16 for TikTok, Reels and Shorts, 1:1 for a square post, 4:5 for the Instagram feed, or 16:9 for YouTube.
- 3
Crop or fit
Crop to fill shows a box over the preview: slide it to keep the important part in frame. Fit on blurred background keeps the whole picture, centered on a soft blurred copy of itself.
- 4
Resize and download
The new video is 1080 pixels on its short side (or the original size if it was smaller), ready to upload.
Crop or blurred background?
Crop to fill uses the whole new frame, so your subject is as big as possible. It works best when the action stays in one area, such as a person talking in the middle of the shot. Slide the crop position to follow them.
Fit on blurred background keeps everything, so nothing is cut off, and fills the empty space with a blurred, slightly darkened copy of the video. It is the better choice for wide shots, screen recordings, slides and anything with text near the edges.
Not sure? Try crop first and watch the preview: if anything important leaves the box, switch to the blurred background.
Sizes for each platform
- TikTok, Instagram Reels, YouTube Shorts: 9:16, 1080 × 1920 pixels.
- Instagram and Facebook feed: 4:5 (1080 × 1350) takes up the most room in the feed; 1:1 (1080 × 1080) also works.
- YouTube, websites, presentations: 16:9, 1920 × 1080.
The tool never makes a small video bigger than it was on its short side. When a crop upscales part of a frame (for example, a vertical crop of a landscape 1080p video), the result is the platform-standard size, but no new detail is created.
For more on choosing between cropping and a blurred background, see our guide to making a video vertical. If you only need tall video, the Make Video Vertical page opens with 9:16 already selected.
Quality and sound
Resizing means drawing every frame again, so the video is re-encoded at a high bitrate in H.264, which every phone and platform plays. The sound is copied unchanged whenever possible. Rotated phone videos are turned upright before resizing, so they come out the right way up.
Next steps from the result: add captions in the new shape, or compress the file for sharing.
Avoid the most common mistakes
Text and faces near the edges. Crop changes what’s near the edges of the frame, so check titles, subtitles and faces in the preview box before you export. If anything is cut, slide the box or switch to the blurred background.
The app’s own buttons. TikTok, Reels and Shorts cover the bottom and right side of the screen with buttons and captions. Keep important details in the middle, and if you add captions afterwards, turn on the safe-area guide in Auto Captions.
Resizing twice. Each re-encode costs a little quality, so resize from the original file rather than from an earlier export when you can.
Private by design
Your video is resized by your own browser and saved straight back to your device. Nothing is uploaded, so drafts and client videos stay private. See how it works.
Frequently asked questions
What size is a TikTok, Reel or Short?
Vertical 9:16, ideally 1080 × 1920 pixels. Choose 9:16 in this tool to get exactly that.
Will resizing cut off part of my video?
Crop to fill removes the parts outside the box you choose. Fit on blurred background keeps the whole picture and fills the extra space with a blurred copy.
Does it lose quality?
The video is re-encoded at a high bitrate, so the loss is very small. A crop that is enlarged to fill a bigger frame can look softer, because no new detail is created.
Can I make a vertical video horizontal?
Yes. Choose 16:9 and use the blurred background to keep the whole picture, or crop to a wide section.
Do iPhone videos come out sideways?
No. The tool reads the rotation your phone stored with the video and turns the picture upright before resizing.
Is my video uploaded?
No. Everything happens in your browser, and the resized video downloads straight to your device.