Technical SEO
Meta Tag Preview
Paste a URL and see exactly how your page looks as a Google result and a shared link, with a quick grade on what to fix.
Why the title and description still decide how you get summarised
The preview fetches your page on the server and reads six things out of the head: the title, the meta description, og:title, og:image, twitter:card, and the canonical. It then renders a Google result and a shared link from the tags that are on the page rather than the ones you meant to ship.
The claim that titles and descriptions no longer matter is a half-truth taken from the fact that Google rewrites snippets. It rewrites them when the ones you wrote are a poor match for the query. The title is still the label attached to your page everywhere else: in the index an answer engine reads, in the citation it prints, and in every link anyone shares. A page called Home is a page with no stated subject.
The two length bands the tool grades against are not superstition, they are truncation. Titles get cut in the results around 60 characters and descriptions around 160, so anything past the limit is written for nobody. Below the floor, 30 characters for a title and 70 for a description, you are leaving the line half empty.
The head block this tool grades
The first block is what most pages ship. The second passes all six checks and gives an engine a stated subject, a summary, and a canonical URL to credit.
<head>
<title>Home | Acme</title>
</head>
<head>
<title>Acme Invoicing: Send and Chase Invoices in One Place</title>
<meta
name="description"
content="Acme sends invoices, chases the late ones and reconciles payments for small agencies. Plans start at $19 a month."
/>
<link rel="canonical" href="https://acme.com/invoicing" />
<meta property="og:title" content="Acme Invoicing" />
<meta property="og:description" content="Send invoices, chase the late ones and reconcile payments in one place." />
<meta property="og:image" content="https://acme.com/og/invoicing.png" />
<meta property="og:url" content="https://acme.com/invoicing" />
<meta name="twitter:card" content="summary_large_image" />
</head>
og:image has to be an absolute URL. A relative path renders correctly in your browser and breaks in every link preview, which is the failure this tool surfaces most often.
Meta tag questions
Google rewrites my title anyway, so why write a good one?
Google rewrites titles when the one you supplied is a weak match for the query or is stuffed with boilerplate. A specific, query-matching title is rewritten less often. It is also used verbatim by AI engines when they cite you, and by every social and chat app that renders your link, none of which rewrite anything.
What is the right meta description length?
Between 70 and 160 characters, with the claim at the front. Under 70 wastes a line you were given for free. Over 160 gets cut mid-sentence in the results, and the part that is cut is the part you wrote last, which is usually the call to action.
My social preview still shows the old image.
Every platform caches link previews aggressively and none of them re-fetch because you edited the tag. Use the platform's own debugger to force a re-scrape, or ship the new image at a new file name so the URL itself changes.
Do I need Twitter tags if I already have Open Graph tags?
Mostly not. X falls back to Open Graph when the twitter tags are missing, and so do Slack, LinkedIn, WhatsApp, and Discord. The one worth setting is twitter:card, because it chooses between a small thumbnail and a large image, and the default is the small one.
Previews the Technical Agent
Fix one page here. Rankfastt audits every page, drafts stronger titles and descriptions, and applies them for you.