HTML animation to an Instagram Reel
Reels live or die on visual polish, and Instagram's compression is harsh on gradients. Framecast renders your HTML or Claude animation frame-by-frame into a clean 9:16 MP4 at up to 4K — extra resolution that survives Instagram's re-encode, with no watermark and no recorder stutter.
One-time $2.99 · free watermarked preview first.
Instagram Reels specs
Instagram compresses uploads hard. Exporting at 4K from Framecast gives the encoder more to work with, so your gradients and fine motion hold up after the platform processes them.
Three steps
Drop your HTML
Drag your animation into the studio. From Claude? See Claude animation to video.
Take the 9:16 export
One drop gives you 16:9, 9:16 and 1:1. Use the vertical 9:16 for Reels.
Share as a Reel
Upload the MP4 in the Instagram app and publish it as a Reel.
Tips for Reels
- Keep the center clear. Instagram overlays the caption, username and audio strip along the bottom — keep key motion in the upper two-thirds.
- Loop seamlessly. Reels autoplay on repeat; a clean loop quietly boosts watch time.
- Square backup. The same drop gives you a 1:1 file for your grid or carousel.
Cross-posting? One drop also covers YouTube Shorts and TikTok. Background reading: HTML to MP4 and vs. screen recording.