Resize Video to Square Free — 1:1 Format for Social Media | MiOffice

Square video (1:1 aspect ratio) is the feed format of choice for Instagram posts, Facebook, and LinkedIn. It takes up more screen space than horizontal video in scrolling feeds, which means more attention and higher engagement. But most cameras shoot in 16:9 or 4:3, not 1:1 — so you need to resize.

MiOffice converts your video to 1080x1080 square (1:1) format directly in your browser using FFmpeg WebAssembly. Crop to focus on the center, or pad to preserve the full frame. No file upload, no watermarks, no account.

Your video stays on your device — nothing is sent to any server.

How to Resize Video to Square

1. 1

   Open the Square Video Resizer

   Go to the square video resizer. FFmpeg WebAssembly loads in your browser automatically — no install or plugin needed.

2. 2

   Upload Your Video

   Drag and drop your video file (MP4, MOV, WebM, AVI). The file loads into browser memory — no server upload. You will see a preview showing the original dimensions and aspect ratio.

3. 3

   Choose Resize Mode

   Crop takes the center square from your video, cutting the excess width (horizontal) or height (vertical). Pad/Fit scales the video to fit inside a 1:1 frame with bars on the shorter dimension. Stretch fills the square by distorting the image.

4. 4

   Download Your Square Video

   FFmpeg encodes the resized video as H.264 MP4 at 1080x1080. Download the result — no watermarks. Ready to post to Instagram, Facebook, LinkedIn, or any platform.

When to Use Square Video

Square video is not the right choice for every platform. Here is where 1:1 works best and where you should use vertical (9:16) or horizontal (16:9) instead:

Why Square Outperforms Horizontal in Feeds

In scrolling feeds (Instagram, Facebook, LinkedIn), a square video takes up 78% more screen space than a 16:9 horizontal video. More screen space means the viewer's thumb is more likely to pause. Data from social media studies consistently shows that square video gets higher engagement rates in feed placements than horizontal video.

The exception is YouTube, where horizontal 16:9 is the native format. For YouTube regular uploads, always use 16:9. For YouTube Shorts, use 9:16 vertical. Square video is specifically a feed format for social platforms.

Crop vs Pad: Choosing the Right Mode

Platform-Specific Tips

Instagram Feed — Square video displays at 1080x1080 in the feed. Instagram also supports 4:5 portrait (1080x1350) which takes up even more vertical space. Consider 4:5 for maximum feed presence, 1:1 for a cleaner grid aesthetic. Both are supported by the resizer.

Facebook Feed — Square video auto-plays as users scroll. Facebook compresses video aggressively, so upload at 1080x1080 with a bitrate of at least 4 Mbps. Shorter videos (under 60 seconds) tend to perform better because Facebook counts 3-second views, and shorter videos have higher completion rates.

LinkedIn Feed — Square video is ideal for LinkedIn because the feed is narrow on desktop. A 1:1 video fills the column width and stands out between text posts. LinkedIn supports videos up to 10 minutes, but engagement drops sharply after 90 seconds for most content types.

Twitter / X — Square and 16:9 horizontal both display well on Twitter. Square takes up more timeline space on mobile. Twitter compresses video significantly, so start with the highest quality source you have.

Need Vertical Instead?

If your target platform is TikTok, Instagram Reels, or YouTube Shorts, you need 9:16 vertical video, not square. Use these platform-specific resizers:

• • Resize video for TikTok — 1080x1920, up to 10 minutes