Intersection Observer Sandbox - Online Visual Threshold
Adjust root, margin, and threshold. See a live log of intersection events as you scroll. Debug lazy loading.
UD5 Toolkit
Adjust root, margin, and threshold. See a live log of intersection events as you scroll. Debug lazy loading.
Adjust a brightness threshold slider and see the live vector trace of an image. Export as SVG. Potrace‑style.
Convert any photo into a stark 1‑bit black‑and‑white image (no grays). Adjust threshold. Save as PNG.