How to Cross-Post X Reels to Instagram Reels

First, a quick answer: X doesn't have a feature called Reels. "X Reels" usually means the vertical videos in X's full-screen video feed, which X rolled out in March 2026. Those videos can go to Instagram as Reels. X and Instagram attract different audiences with different expectations. X is text-and-commentary-driven while Instagram is visual-first. If your X videos are visually compelling (tutorials, behind-the-scenes, hot takes on camera), they can perform well as Reels with the right adjustments. Here is how to make the transition seamlessly.

1. 1

   Save your video in Reels-compatible format

   Use the original vertical (9:16) video from your device. Instagram Reels require vertical format, 1080x1920 resolution is ideal. If your X video is horizontal, crop or re-edit it to vertical.

2. 2

   Adapt your caption for Instagram

   Instagram captions can be longer and more detailed than X posts. Add relevant hashtags (up to 30, though 5-10 targeted ones work best). Include a call-to-action encouraging saves and shares, which boost Reels in the algorithm.

3. 3

   Upload to Instagram or use ShortSync

   Upload directly through the Instagram app or use ShortSync to post to both X and Instagram Reels simultaneously with platform-specific captions.

4. 4

   Add Instagram-specific elements

   Consider adding trending Instagram audio to boost discoverability. Add a cover image that looks good on your profile grid. Tag relevant accounts and add a location if applicable.

5. 5

   Publish and promote

   Post during Instagram peak hours or schedule ahead. Share the Reel to your Stories for additional reach. Engage with early comments to signal the algorithm.

• Add trending Instagram audio to your Reel even if the original X video had different audio. Trending sounds dramatically boost Reels reach.
• Instagram rewards saves and shares more than likes, so create content that people want to revisit.
• Use the Reel cover image feature to maintain a cohesive profile grid aesthetic.
• If your X video is a hot take or commentary, add text overlays since many Instagram users watch without sound.

Your X video content can reach an entirely new audience on Instagram Reels. Focus on visual appeal, trending audio, and Instagram-native formatting. Use ShortSync to automate cross-posting across both platforms.