9:16 for TikTok/Reels/Story (mobile vertical). 1:1 for IG Feed. 4:5 IG Portrait. 16:9 YouTube/Facebook landscape. 4:3 photo classic.
Tip: Shoot 16:9 → crop 9:16 for TikTok. Frame subject in center when shooting.
How to change a video's aspect ratio — 4 steps
Upload your video: drag and drop or select an MP4 file up to 500 MB.
Choose a ratio: pick from 9:16, 1:1, 4:5, 16:9, 4:3 or 3:4 to match the platform you are posting to.
Pick a mode & position: use Crop for no black bars or Pad to keep the full frame, and anchor the crop to Center, Top, Bottom, Left or Right.
Export & download: render the H.264 MP4 and download it — no watermark, no signup.
This is the fastest way to turn a landscape 16:9 recording into a vertical 9:16 clip for TikTok or Reels, square it
up for an Instagram feed, or pad a portrait video so nothing is cut off. The output is a standard H.264 MP4 with
faststart, the tool is free with no watermark, and your uploaded files are
automatically deleted after 10 minutes.
Frequently asked questions
Which aspect ratios can I crop my video to?
There are 6 social-ready ratios: 9:16 for TikTok, 1:1 for Instagram, 4:5 Portrait, 16:9 for YouTube, plus 4:3 and 3:4.
What is the difference between Crop and Pad mode?
Crop mode cuts the content to fill the new ratio with no black bars. Pad mode keeps the whole frame and adds black bars to reach the target ratio.
Can I choose which part of the frame is kept?
Yes. In crop mode you can anchor to one of 5 positions — Center, Top, Bottom, Left or Right — so your subject stays in view.
What is the output format?
The result is a standard H.264 MP4 with faststart enabled, so it is ready to upload and plays smoothly everywhere.
Is it free and are my files kept?
It is completely free with no watermark and supports files up to 500 MB. Uploaded files are automatically deleted after 10 minutes.