SERP simulator: Google snippet preview
Type your title tag, meta description and URL: the Google result preview updates live, with the width measured in pixels and a truncation warning. Everything runs in your browser.
Rating out of 5, then number of reviews.
Your page description will appear here. Google usually shows two lines on both desktop and mobile.
Indicative preview: Google sometimes rewrites the title and often picks a different snippet depending on the query.
What a SERP simulator does
A SERP simulator, or SERP preview tool, shows how your page would look in Google search results before you publish it. Google does not cut titles at a fixed number of characters: it cuts at a display width, about 600 pixels on desktop. A W takes three times the space of an i, so two 55-character titles can meet very different fates. This tool measures your text in the font used by Google (Arial 20 px for the title, 14 px for the description) and warns you before the cut.
The benchmarks to know
For the title, aim for under 600 pixels, which in practice means 50 to 60 characters. For the meta description, count about 920 pixels on desktop and 680 on mobile, or 150 to 160 characters. A description that is too long is not an error: it is simply cut. Keep the decisive information at the start of the tag.
What the tool cannot predict
Google rewrites a significant share of titles and often builds the snippet from the page content rather than from the meta description, depending on the query typed. The preview shows the case where your tags are used as they are, which remains the scenario to optimize first.