Postraft

Resize video for social, free.

Drop a video, pick a format, download an MP4 cropped to fit the platform. Runs on your device. Your video never leaves your browser.

  • 100% private
  • No signup
  • No watermarks

How it works

Three steps. No signup. Nothing leaves your browser.

  1. 1

    Drop your video

    MP4, MOV, WebM, or MKV. Your file stays on your device the whole time.

  2. 2

    Pick a format

    9:16 for Reels, TikTok, and Stories. 1:1 or 4:5 for feed posts. 16:9 for YouTube.

  3. 3

    Download the MP4

    The video is scaled and cropped to fill the new frame, then downloads as an MP4.

Frequently asked questions

How does the cropping work?
The video is scaled to fill the target frame and the overflow is cropped evenly from the edges. Nothing gets stretched or squashed.
Which format should I pick for each platform?
9:16 for Reels, TikTok, and Stories. 1:1 for square feed posts. 4:5 for the Instagram feed. 16:9 for YouTube and other landscape players.
Does resizing reduce the quality?
The video is re-encoded once at the target resolution. Every preset outputs frames at least 1080 pixels on the short side, the same class of resolution the major platforms display.
Does my video get uploaded anywhere?
No. Resizing happens entirely in your browser on your own device. Nothing leaves your computer.
Is this video resizer really free?
Yes. No signup, no watermarks, no limits on file size or how many videos you resize.

Built by Postraft

Resizing it to post it? Let Postraft make the post too.

Turn your everyday videos into Reels and posts in minutes, not hours.

Try Postraft free