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HTML Formatter
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HTML Tool

HTML Diff Tool

Compare two HTML snippets side-by-side and see exactly what changed — added lines highlighted in green, removed lines in red.

version A
version B
diff
Version A (original)
Version B (modified)
Diff Result
Diff will appear here after you click Compare.
Lines added
Lines removed
Unchanged

Line-by-line diff

Compares HTML line by line, showing exactly which lines were added, removed, or unchanged between the two versions.

Common uses

Reviewing changes before deploying, comparing before/after formatting, checking what a CMS modified, or verifying template edits.

Format first

For the most useful diff, run both snippets through the HTML Formatter first so whitespace differences don't obscure real changes.