SERP Simulator — Free Google Snippet Preview Tool
See exactly how your page looks in Google search results — by pixel width, not guesswork — on both desktop and mobile. RankNibbler's free SERP simulator (a.k.a. SERP snippet generator) previews your title and meta description live, warns you before they truncate, bolds your keyword the way Google does, and lets you analyse any live URL or save a snippet for later.
Preview your snippet on desktop and mobile
Type or paste a title and meta description and the preview shows your Google snippet exactly as searchers will see it — the blue title, the URL, and the grey description. Flip between desktop and mobile, because mobile truncates at a narrower width: a snippet that fits perfectly on a laptop can be cut short on a phone, and most of your traffic is mobile. Add your target keyword and it's bolded in the preview, just as Google highlights words that match the search.
How long should a title tag be?
Aim for roughly 50–60 characters, or under about 580 pixels, so Google doesn't cut your title off with an ellipsis on desktop. The simulator shows a live pixel meter as you type and warns you the moment you go over. Put your most important words — and your keyword — near the front, where they'll always be visible even if the end gets trimmed on mobile.
How long should a meta description be?
Keep meta descriptions to about 150–155 characters (roughly 990 pixels on desktop). Mobile shows less, so lead with the message that matters in the first ~120 characters. A meta description isn't a direct ranking factor, but it's your ad copy in the results — a clear, specific description earns more clicks than a vague one, and the simulator helps you write to the space you've actually got.
Why length is measured in pixels, not characters
This is the part most character-counters get wrong. Google truncates titles and descriptions by their rendered pixel width, not by character count — and letters aren't equal widths. A wide W or M takes far more space than a narrow i or l, so two titles with the exact same number of characters can render at very different widths — one fits, the other gets cut off. RankNibbler measures the actual pixel width for both the title and the description, so what you see is what Google will show.
Why Google rewrites your title or description
Sometimes you craft the perfect title and Google shows something else. It rewrites titles that are too long, keyword-stuffed, or a poor match for the query, and it frequently writes its own description from the page when yours doesn't fit the search — studies have found Google changes the majority of titles it's given. You can't force it, but you can stack the odds: keep the title concise and within the pixel limit, make it match your H1 and the page's actual topic, and write a description that reads like a genuine answer to the query.
How to use the SERP simulator
It takes seconds:
1. Analyse a URL or start fresh
Paste a page URL to load its current title and meta description, or just type your own to test a new snippet from scratch.
2. Edit the title and description
Edit them and watch the live preview and the pixel-width meters — stay in the green and nothing truncates.
3. Add your target keyword
Type your keyword to see it bolded in the preview, and toggle between desktop and mobile to check both.
4. Copy the HTML or save the snippet
Copy the ready-made <title> and <meta name="description"> code, or save the snippet to revisit and refine later.
Frequently asked questions
What is a SERP snippet?
The title, URL and description Google shows for your page in search results. It's usually drawn from your page's title tag and meta description.
How long should a title tag be?
Aim for about 50–60 characters, or under roughly 580 pixels, so it isn't truncated on desktop. Mobile can show slightly more, but keep the important words first.
How long should a meta description be?
Around 150–155 characters (roughly 990 pixels on desktop). Mobile truncates earlier, so put the key message in the first ~120 characters.
Why is title length measured in pixels, not characters?
Google truncates by rendered pixel width, and wide letters like W and M take far more space than narrow ones like i and l — so two titles of the same character count can display very differently.
Why did Google rewrite my title or meta description?
Google rewrites titles that are too long, keyword-stuffed, or a poor match for the query, and often writes its own description from the page. Keeping the title concise and matching your H1 reduces rewrites.
Does the meta description affect SEO or rankings?
It's not a direct ranking factor, but a compelling description lifts click-through rate from the results, which supports performance indirectly.
What's the difference between mobile and desktop snippets?
Mobile usually truncates titles and descriptions at a narrower width, so a snippet that fits on desktop can be cut off on a phone. Preview both before you publish.
Why does Google bold some words in my snippet?
Google bolds terms that match the searcher's query. Previewing with your target keyword highlighted shows how your snippet will stand out, which helps click-through rate.
Preview your first snippet
It's free, and it sits alongside the rest of your SEO tools.