Claude makes beautiful HTML animations, but screen recording wrecks them with dropped frames, banded gradients, and a watermark. framecast renders your animation frame-by-frame in a real browser engine into a clean, watermark-free MP4: YouTube 16:9, vertical 9:16, and square 1:1 from one drop. Works with CSS, GSAP, canvas, and SVG. Free preview, then $2.99 per video, no subscription.