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URL Diff

Compare any two URLs side-by-side. We capture both pages in headless Chrome, then surface visual, DOM, network, accessibility (axe-core + WCAG) and page-text differences in one report.

What you get

  • Visual - full-page screenshots plus four diff variants (pixelmatch, page-shift-aligned, SSIM, butteraugli).
  • DOM - added, removed and changed elements with multi-strategy selectors.
  • Network - request count and bytes delta, status changes, slowdowns and failures.
  • Accessibility - full axe-core 4.11 output and a WCAG score for each page, with regressions called out.
  • Page text - line-level diff of the visible text content.

Captures live for 1 hour, then are deleted. Public URLs only - private/internal addresses are blocked. Limited to 5 requests per minute.