Heatmap visualizer
Pick a folder containing A/ and B/ subfolders. Matching file names get overlaid: source on the bottom, heatmap on top. Scrub the blend, page through, grab a screenshot. Everything runs in your browser — nothing is uploaded.
Nothing loaded yet. Pick a folder to begin.
Expected layout: your-folder/A/<name> and your-folder/B/<name> with identical file names.