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Resize a Video for Instagram Feed (4:5)

The tallest format the feed allows

Make a feed-optimized 4:5 video in your browser: 4:5 takes up the most screen space Instagram's feed allows, which means more attention per scroll. Blurred-background or crop fill, trim, clean MP4 export — nothing uploaded.

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Maximum feed real estate

4:5 (1080×1350) is the tallest the feed shows — your video takes the most screen possible without being cropped by Instagram.

Runs on your hardware

Where your browser supports it (Chrome/Edge/Safari), the work runs on your device's video hardware via WebCodecs — far faster than uploading to a server and waiting in a queue.

Free, no watermark, no caps

No account, no watermark, no length or file-size tiers, no daily limit. The things other video sites paywall are simply free here.

How to do it

  1. 1Drop your video in — 4:5 is preselected.
  2. 2Pick the fill style and position the frame.
  3. 3Trim and export the MP4.

FAQ

What's the best video size for the Instagram feed?

4:5 portrait (1080×1350) — the tallest format the feed displays fully, and this page's default.

Should I post 4:5 or square?

4:5 occupies ~25% more screen than 1:1 in the feed, which usually wins attention. Use square when the composition demands it (there's a preset for that too).

Is there a watermark?

Never — the export is clean.

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All free, no watermark, nothing uploaded — your hardware does the work. Open the full Video Studio →