Paste HTML <head> to read its tags
Previews are approximations. Search engines and social networks can change how they display pages at any time.
Check how a shared link will look on Facebook, LinkedIn, X and Slack before you post it. Paste your page’s <head> or type og:title, og:description and og:site_name, and add a local image to see how a 1200 × 630 picture is cropped in each card. Nothing is fetched or uploaded.
How to use
- Type a title, description and URL. The SERP tab shows the Google result for desktop or mobile, cut at the same pixel widths Google uses.
- Meta tags turns those values plus canonical, robots, Open Graph, Twitter Card and hreflang into HTML you can copy.
- Social shows link cards for X, Facebook, LinkedIn and Slack. Paste a page’s <head> to read its tags, and add a local image to see it in the cards.
- robots.txt builds a file from presets and tests URLs for each crawler. Sitemap turns a URL list into sitemap.xml.
- Google truncates titles at about 600 px on desktop and descriptions at about 920 px, and may rewrite them. Use the preview as a guide, not a guarantee.
- Nothing is fetched: the tool never loads your page, so it works for local and staging sites. Images in the social preview come only from files you add.
- robots.txt is tested with Google’s rules: the most specific User-agent group applies, and the longest matching path wins; Allow wins a tie. * and $ wildcards are supported.
- A sitemap file can hold up to 50,000 URLs and 50 MB.
Titles and descriptions are measured in pixels
Google does not cut snippets after a fixed number of characters. On desktop it truncates titles at roughly 600 pixels and descriptions around 920 pixels, so a title full of W and M runs out much sooner than one with i and l. That is why character counters disagree with what you see in search results; this preview renders the text in the same font and measures it.
Keep the main keyword near the start of the title, write a description that answers the search, and remember that Google may rewrite either one if it thinks another part of the page fits the query better.
Tags that matter
The title tag and meta description shape the search snippet. rel=canonical tells search engines which URL is the main version of duplicated pages, meta robots with noindex keeps a page out of the index, and hreflang links connect language versions. Open Graph tags (og:title, og:description, og:image) control link cards on Facebook, LinkedIn and Slack; X reads twitter:card and falls back to Open Graph. A 1200 × 630 image works for most networks. Google ignores the meta keywords tag.
robots.txt and sitemaps
robots.txt (RFC 9309) controls crawling, not indexing: a blocked URL can still appear in results if other sites link to it, so use noindex for that. The most specific User-agent group applies, the longest matching rule wins and Allow wins a tie. A sitemap lists the URLs you want crawled, up to 50,000 URLs or 50 MB per file; Google uses lastmod when it is accurate and ignores priority and changefreq.
Frequently asked questions
How long should a title tag be?
Aim for about 50 to 60 characters, but what really counts is pixel width: Google cuts desktop titles at roughly 600 pixels. Check the preview to see exactly where yours is truncated.
How long should a meta description be?
Around 120 to 155 characters usually fits; Google truncates at about 920 pixels on desktop and shows less on mobile. Put the key information first in case it gets cut.
Why does Google show a different title than mine?
Google rewrites titles it considers too long, stuffed with keywords or not matching the page, often using the H1 or anchor text instead. A concise, accurate title that matches the main heading is rewritten less often.
What image size should I use for Open Graph?
1200 × 630 pixels (1.91:1) works for Facebook, LinkedIn and X large cards. Keep important text away from the edges, since some apps crop the image to a square or a smaller ratio.
Does blocking a page in robots.txt remove it from Google?
No. robots.txt only stops crawling. The URL can still be indexed from links. To remove a page, allow crawling and add a noindex meta tag, or delete it and return 404 or 410.
Does this tool fetch my website?
No. You type or paste the values, or paste your page’s <head>, and everything is computed in the browser. That is why it also works for pages behind a login or on localhost.