Meta Tag Generator with SERP Preview
Free meta tag generator with Google SERP preview, title and description length checks, Open Graph tags and FAQ schema JSON-LD from markdown.
Widths are estimated from Arial glyph metrics: about 580px for the title and 920px for the description on desktop. Google adjusts these limits over time.
<title>Free Markdown Table Generator for GitHub and Docs</title> <meta name="description" content="Build markdown tables from a grid or CSV, align columns and copy GFM output. Free, no signup, runs in the browser."> <meta name="author" content="Jane Doe"> <meta name="robots" content="index, follow"> <link rel="canonical" href="https://example.com/tools/markdown-table-generator"> <!-- Open Graph --> <meta property="og:type" content="website"> <meta property="og:title" content="Free Markdown Table Generator for GitHub and Docs"> <meta property="og:description" content="Build markdown tables from a grid or CSV, align columns and copy GFM output. Free, no signup, runs in the browser."> <meta property="og:url" content="https://example.com/tools/markdown-table-generator"> <meta property="og:site_name" content="Example Tools"> <meta property="og:image" content="https://example.com/og/table-generator.png"> <meta property="og:locale" content="en_US"> <!-- Twitter / X --> <meta name="twitter:card" content="summary_large_image"> <meta name="twitter:site" content="@example"> <meta name="twitter:title" content="Free Markdown Table Generator for GitHub and Docs"> <meta name="twitter:description" content="Build markdown tables from a grid or CSV, align columns and copy GFM output. Free, no signup, runs in the browser."> <meta name="twitter:image" content="https://example.com/og/table-generator.png">
What Is a Meta Tag Generator?
A meta tag generator is a form that produces the HTML tags search engines and social networks read from a page's head: the title, the meta description, the canonical URL, the robots directive, Open Graph tags for Facebook and LinkedIn, and Twitter card tags for X. Writing them by hand is easy to get slightly wrong: a description that runs 20 characters too long is cut mid-sentence in the results, and a missing og:image means a link shared on Slack shows no picture.
This tool pairs the form with a SERP preview that estimates pixel widths, a helper that pulls the title and first paragraph out of a markdown post, and a second tab that builds FAQ schema from markdown questions. Everything runs in your browser.
How to Generate Meta Tags With a SERP Preview
- Type the title and description, or open Prefill from a markdown post, paste the post and click the button to fill both from the H1 and first paragraph.
- Watch the counters: green fits, amber is close to the limit, red will be truncated. Switch the preview between Desktop and Mobile.
- Add the canonical URL, site name, author and robots settings. Leave index and follow on unless the page must stay out of search.
- Fill the Open Graph image (1200 by 630 pixels), type and locale, and the Twitter card type and handles.
- Copy the Meta tags block into the page head, or download it. For FAQ pages, switch to the FAQ schema tab.
Meta Title Length Checker: Limits That Matter
Google truncates by pixel width, not character count, which is why the checker reports both:
| Tag | Desktop limit | Mobile limit | Typical characters |
|---|---|---|---|
| Title | ~580px at 20px Arial | ~920px over two lines | 50–60 |
| Description | ~920px over two lines | ~1300px over three lines | 120–155 |
| og:title | No hard limit; ~60 shown | Same | 40–60 |
| og:description | Cut at ~200 by most apps | Same | 100–200 |
Wide capitals such as W and M use up the budget faster than narrow letters like i and l, so two titles of 58 characters can differ by 80 pixels. The checker sums per-character Arial widths to catch that.
Open Graph Generator and Twitter Cards
The open graph generator fills og:type, og:title, og:description, og:url, og:site_name, og:image and og:locale. Facebook, LinkedIn, Slack, Discord and iMessage all read these tags to build the link preview, and they fall back to the plain title and description when the og: versions are absent. X reads twitter:card first: summary_large_image shows the image full width above the title, while summary shows a small square thumbnail beside it. twitter:site names the publication's account and twitter:creator the author's; both are optional but appear in the card when set.
Why Use a Meta Tag Generator With a FAQ Schema Generator
A meta tag generator keeps the snippet within limits, and a faq schema generator on the same page keeps the structured data consistent with it: the questions you answer in the page body become Question and Answer entities that search engines and AI assistants can quote directly. Generate both when you publish a post, check the preview once more after editing the title, and reuse the description in your llms.txt and front matter so every channel describes the page the same way.
Frequently Asked Questions
What does a meta tag generator do?
A meta tag generator writes the <title>, <meta name="description">, canonical link, robots directive, Open Graph and Twitter card tags for a page from a form, and shows how the result looks in Google. You paste the block into the <head> of the page or map the fields to your framework's metadata API.
How long should a meta title be?
Google cuts desktop titles at roughly 580 pixels, which is 50 to 60 characters for typical English text because letters vary in width. The meta title length checker measures the estimated pixel width with Arial glyph metrics and turns amber above 95 percent of the limit and red when the title would be truncated.
How accurate is the SERP preview?
It is an estimate. The preview uses the same font size Google shows, 20px for titles and about 14px for descriptions, and the commonly measured cut-offs of 580px and 920px on desktop. Google changes its layout and sometimes rewrites titles, so treat the preview as a guide rather than a guarantee.
What is the From markdown helper?
Paste a markdown post and the tool takes the first H1 as the title and the first real paragraph, trimmed to 155 characters at a word boundary, as the description. Headings, images, code blocks, lists and front matter are skipped, so you get prose rather than syntax.
How does the FAQ schema generator work?
Write each question as a ## heading followed by its answer, or as Q: and A: lines, and the FAQ tab emits a FAQPage JSON-LD script with one Question and acceptedAnswer per pair. Paste it anywhere in the page HTML. Google shows FAQ rich results only for some sites now, but the markup still helps answer engines understand the page.
Is anything sent to a server?
No. Length checks, the preview, the meta tags and the JSON-LD are all generated in your browser.