Resize Video for Instagram Reels - 9:16 Format

1080x1920 pixels (9:16 vertical) — same as TikTok and YouTube Shorts. MiOffice converts any video to this exact format.

Yes. Pick Crop to Fill for a full-screen look, Blurred Background to keep all content visible, or Black Bars for simple padding.

Blurred Background is most popular — it keeps your full video visible while filling the vertical frame with an aesthetic blurred version behind.

Same 9:16 output dimensions. The encoding is optimized for Instagram's compression algorithm, but practically the output works on both platforms.

MP4, WebM, MOV, AVI, and MKV input. Output is always MP4 (H.264) for Instagram compatibility.

Up to 500MB input. No daily limits, no account needed, no watermarks.

No. By default, FFmpeg runs via WebAssembly in your browser. On some devices, processing may use our secure server.

Instagram allows Reels up to 90 seconds. Trim your video first with MiOffice's Trim tool if it's longer.

Yes. Works on any mobile browser — resize right on your phone before posting to Instagram.

Yes. All three platforms use 1080x1920 (9:16). One resize works for all three.