Free to try · Instagram Reels resizer
Resize videos for Instagram Reels — subject always in frame
Reels play full-screen at 9:16, while feed posts look best at 4:5.
Cropus makes both from one upload and follows the people in your video, so nobody gets cropped out of the post.
- Smart crop follows your subject — no keyframes
- 9:16, 4:5, 1:1 and 16:9 from one upload
- No watermark, original sound
5 free minutes · No card needed
Why Cropus
Reels that keep people in the picture
Reel and feed in one go
9:16 and 4:5 are picked together. One analysis powers both, and the second format uses no extra minutes.
People stay in shot
Workouts, outfit changes, behind-the-scenes clips: the frame follows the person, not the middle of the picture.
Blurred background option
Want the whole frame? Balanced and Fit place your video over a soft blurred copy instead of black bars.
Works in the browser
Nothing to install. Upload from your laptop or phone and download an MP4.
Center crop vs Smart crop
The crop that keeps up
A plain center crop cuts whatever happens to be in the middle. Smart crop tracks the subject through the shot, so the action never leaves the screen.
Smooth camera
The crop glides with your subject. No jitter, no seasick jumps between frames.
Cuts handled
On a scene cut the frame jumps cleanly to the new shot instead of panning across it.
Blur fill
Balanced and Fit fill the bars with a soft, blurred copy of your video — or classic black.
Every format at once
Pick every aspect ratio together. One analysis powers them all, so extra formats are quick and free.
How it works
From one upload to every feed
Upload your video
Drop in any clip — a vlog, a dance, a match highlight, a product shot. Landscape or portrait, up to 4 GB.
AI finds and follows the subject
Cropus watches every scene, finds who matters and plans a smooth camera path that keeps them in frame.
Download every format
Get 9:16, 4:5, 1:1 and 16:9 versions from one upload — ready for Shorts, Reels, TikTok and feeds.
FAQ
Frequently asked questions
What is the right size for an Instagram Reel?
Reels are vertical 9:16 video, typically 1080×1920 pixels, and they fill the whole phone screen.
Should I post 9:16 or 4:5 on Instagram?
Use 9:16 for Reels, where the video fills the screen. For a regular feed post, 4:5 is the standard portrait shape — taller than square. Cropus exports both from the same upload.
Can I turn a landscape video into a Reel?
Yes. Upload the 16:9 video, keep 9:16 selected, and Cropus crops it to vertical while following the subject. Choose Fit if you'd rather keep the full picture.
Does each extra Reel format use more minutes?
No. You pay once for the length of the video you upload; every format you add for it is free.
What file do I get for Instagram?
An MP4 with H.264 video and AAC audio — up to 1080×1920 for the 9:16 Reel — a format Instagram accepts directly. Save it to your phone and post it.
Can I resize a Reel that's already vertical?
Yes. Upload a 9:16 video and choose 4:5 or 1:1 to get a feed post or a square version that still keeps the subject in frame.
More tools
Other ways to reframe
Try it on your own video
Resize any video for Instagram Reels in 9:16, plus a 4:5 version for the feed from the same upload. Smart crop keeps people in frame. Free to try.
Reframe a video5 free minutes · No card needed