What are you checking?

Content type

Device

One title (or description) per line

Each line is measured on its own. Blank lines are ignored.

Results

#	Text	Pixel width	Status

This is an estimate, not a guarantee. Google truncates results based on rendered pixel width, not a fixed character count, so this tool approximates Google's desktop and mobile fonts to measure each line. Google also sometimes rewrites titles and descriptions entirely if it thinks something else on the page fits the query better, so treat a "safe" result as "unlikely to be cut off," not a promise of exactly what will display.

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How is truncation calculated?

Each line is measured using the browser's canvas API with a font and size approximating Google's desktop and mobile results, then compared against commonly cited truncation thresholds (roughly 580–600px for desktop titles, ~920px for desktop descriptions, narrower on mobile). These thresholds shift periodically when Google adjusts its results page design, so treat them as a close approximation rather than an exact spec. For a single title or description with a live preview of how it'll actually look, use the SERP Snippet Preview tool instead.

Other free tools: CTR-by-Position Estimator · SERP Snippet Preview · Open Graph Previewer · Robots.txt Tester · Canonical Tag Checker · Schema Markup Generator · Heading Structure Checker · Readability Scorer · Search Console RegEx Generator · Schema Markup Validator · Keyword Intent Classifier · XML Sitemap Validator · Robots.txt Generator · Hreflang Tag Checker · Keyword Multiplier