Resize Video for Instagram
Crop any video to Instagram's exact formats — Reels, portrait feed, or square — right in your browser.
Instagram uses three distinct video shapes: 9:16 vertical for Reels and Stories, 4:5 portrait for feed posts (the tallest a feed video can be, and the most screen space you can claim), and classic 1:1 square. Upload the wrong shape and Instagram crops it arbitrarily — usually straight through the middle of whatever mattered.
This tool center-crops your video to the exact format you choose and outputs a 1080-pixel-wide H.264 MP4, ready to upload. Processing runs entirely in your browser with nothing uploaded to any server.
How to resize video for instagram online
- 1Drop your video into the box above — any aspect ratio works.
- 2Pick the target: Reels/Stories (9:16), feed portrait (4:5), or square (1:1).
- 3Click Resize Video and wait for processing.
- 4Download and upload straight to Instagram.
Frequently asked questions
Which Instagram format should I use?
Reels and Stories require 9:16 vertical. For feed posts, 4:5 portrait takes up the most screen space and performs best. Square is a safe classic that also crops cleanly into a profile grid.
What resolution does Instagram want?
1080 pixels wide — exactly what this tool outputs: 1080×1920 for Reels, 1080×1350 for portrait, 1080×1080 for square, all H.264 MP4.
The crop cut off something important — what can I do?
This tool crops through the center of the frame. If your subject is off-center, trim the video to the section where the subject is centered, or choose a less aggressive format like 4:5 instead of 9:16.
Does this work for TikTok and YouTube Shorts too?
The Reels 9:16 output is exactly the format TikTok and Shorts use — one file works on all three platforms. We also have dedicated TikTok and Shorts resize tools with a fit-with-bars option.
Related tools
Convert any video to 9:16 vertical (1080×1920) — crop to fill the frame or fit with clean bars.
Turn any footage into a proper 9:16 Short — crop to fill or fit with bars, processed on your device.
Cut the clip you need in seconds — lossless, in your browser, with no upload and no watermark.