Tools / HTML Diff

Compare two versions of HTML

Paste two HTML documents, or fetch two live URLs, to see exactly what changed: lines, elements, attributes, text and SEO tags.

Source

Pasted HTML is compared in your browser. It is never uploaded.

Original HTMLEmpty

Updated HTMLEmpty

Options

Comparison modeRaw textCompares your HTML exactly as written, line by line.DOM-awareParses both documents and compares elements, attributes and text. Formatting is ignored and malformed HTML is repaired the way a browser would.Text content onlyCompares the visible text and ignores all markup.

Ignore attributes

Ignore classes

Ignore ids

Base URL for link checks (optional)

Separate patterns with commas or spaces; * matches any characters. In Raw mode, whitespace-only lines are hidden when whitespace is ignored.

Keyboard shortcuts

Ctrl/⌘ + Enter: Compare
Alt + ↓ / ↑: Next / previous change
n / p: Next / previous change (outside text fields)
Alt + Shift + C: Clear both editors

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Paste the original and updated HTML above, or fetch two live URLs, then press Compare (Ctrl/⌘ + Enter). Results appear here with a line-by-line diff, element changes, an SEO audit and safe previews.