Q: After replatforming, how do I prove pages didn't lose content — eyeball it or use a tool?

Q: After replatforming, how do I prove pages didn't lose content — eyeball it or use a tool?

Eyeballing 2,000 pages isn't realistic, so let's compare the automated options.

Short answer: use a content-diff crawl for text/SEO elements, visual regression tools only for design-critical pages.

Long answer:
Text-level comparison matters most for rankings. Crawl old and new, export titles, meta descriptions, H1s, and word counts, then diff them. A sudden word-count drop on a key page usually means content didn't migrate — a common silent killer.

Visual regression tools (Percy, BackstopJS) screenshot old vs new and flag pixel differences. Useful for templates and conversion pages, but overkill for proving SEO content survived.

The priority order: structured SEO elements first, body content second, pixels last.

Next step: crawl both versions, diff word counts and titles, and manually review any top page that lost more than 20% of its text.