What tags does it generate?

Title, meta description, canonical, robots, viewport, the full Open Graph set (og:title/description/type/url/site_name/image with width, height, and alt), and the Twitter Card set (twitter:card/title/description/image/site). Empty fields are omitted and sensible fallbacks fill the rest.

Why measure title width in pixels?

Google truncates titles at roughly 600px, not a fixed character count — a 'W' is far wider than an 'i'. The tool measures rendered pixel width so the preview matches what searchers actually see.

What image size should I use for og:image?

1200×630 (1.91:1), under ~1MB, as an absolute https URL. One 1200×630 image covers Facebook, LinkedIn, Slack, Discord, WhatsApp, and works as an X summary_large_image card. Keep key text inside the centered ~80% safe zone.

What's the difference between Open Graph and Twitter tags?

Open Graph (used by Facebook, LinkedIn, Slack, Discord) uses property="og:...". Twitter/X uses name="twitter:...". Mixing the two breaks cards — this generator emits each correctly and falls back to og:* when a twitter:* tag is missing.

Is anything sent to a server?

No. The form, previews, and tag output are all generated in your browser. Nothing is uploaded.

SEO Meta Tag Generator (with Live Previews)

Build a complete, valid set of SEO and social meta tags from one short form, and watch how your page will look in Google search results and when shared on X/Twitter, Facebook, and LinkedIn — all previewed live. Title length is measured in real pixels (not characters) so you know exactly when Google will truncate it. Smart fallbacks (og:title from your title, twitter:* from og:*) mean you fill a few fields and get the full tag set. Copy the entire <head> block in one click. Open Graph uses property=, Twitter uses name= — handled correctly so your cards don't break. Everything runs client-side.

Fill in a few fields and get a ready-to-paste <head> block with Open Graph and Twitter tags, plus live Google, X, Facebook, and LinkedIn previews. Everything runs in your browser.

Page title59 chars · 531px — good

Meta description151 / 160 — near limit

Canonical URL

Site name

OG / social image URL(1200×630)

OG type

Robots

Twitter / X handle

Twitter card

Google

markdownme.com

Markdown Editor & 20+ Free Developer Tools — markdownme.com

Edit and preview GitHub Flavored Markdown in your browser, plus free tools for JSON, tokens, QR codes, and SEO. No signup, nothing leaves your browser.

X / Twitter

Markdown Editor & 20+ Free Developer Tools — markdownme.com

markdownme.com

Facebook

markdownme.com

Markdown Editor & 20+ Free Developer Tools — markdownme.com

Edit and preview GitHub Flavored Markdown in your browser, plus free tools for JSON, tokens, QR codes, and SEO…

Markdown Editor & 20+ Free Developer Tools — markdownme.com

markdownme.com

Generated <head> tags

<title>Markdown Editor &amp; 20+ Free Developer Tools — markdownme.com</title>
<meta name="description" content="Edit and preview GitHub Flavored Markdown in your browser, plus free tools for JSON, tokens, QR codes, and SEO. No signup, nothing leaves your browser." />
<link rel="canonical" href="https://markdownme.com/" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta property="og:title" content="Markdown Editor &amp; 20+ Free Developer Tools — markdownme.com" />
<meta property="og:description" content="Edit and preview GitHub Flavored Markdown in your browser, plus free tools for JSON, tokens, QR codes, and SEO. No signup, nothing leaves your browser." />
<meta property="og:type" content="website" />
<meta property="og:url" content="https://markdownme.com/" />
<meta property="og:site_name" content="markdownme.com" />
<meta property="og:image" content="https://markdownme.com/og-image.png" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta property="og:image:alt" content="Markdown Editor &amp; 20+ Free Developer Tools — markdownme.com" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Markdown Editor &amp; 20+ Free Developer Tools — markdownme.com" />
<meta name="twitter:description" content="Edit and preview GitHub Flavored Markdown in your browser, plus free tools for JSON, tokens, QR codes, and SEO. No signup, nothing leaves your browser." />
<meta name="twitter:image" content="https://markdownme.com/og-image.png" />
<meta name="twitter:site" content="@markdownme" />

Tips

og: tags use property=; Twitter tags use name= — this generator gets both right.
Title pixel width matters more than character count — Google truncates around 600px.
Keep your social image at 1200×630 (1.91:1) so it never gets cropped across platforms.
Empty fields fall back smartly: og:title uses your page title, twitter:image uses your OG image, and so on.
LinkedIn usually ignores the description, so the preview shows only title and domain.

100% client-side — nothing you type leaves your browser.

Frequently Asked Questions

What tags does it generate?: Title, meta description, canonical, robots, viewport, the full Open Graph set (og:title/description/type/url/site_name/image with width, height, and alt), and the Twitter Card set (twitter:card/title/description/image/site). Empty fields are omitted and sensible fallbacks fill the rest.
Why measure title width in pixels?: Google truncates titles at roughly 600px, not a fixed character count — a 'W' is far wider than an 'i'. The tool measures rendered pixel width so the preview matches what searchers actually see.
What image size should I use for og:image?: 1200×630 (1.91:1), under ~1MB, as an absolute https URL. One 1200×630 image covers Facebook, LinkedIn, Slack, Discord, WhatsApp, and works as an X summary_large_image card. Keep key text inside the centered ~80% safe zone.
What's the difference between Open Graph and Twitter tags?: Open Graph (used by Facebook, LinkedIn, Slack, Discord) uses property="og:...". Twitter/X uses name="twitter:...". Mixing the two breaks cards — this generator emits each correctly and falls back to og:* when a twitter:* tag is missing.
Is anything sent to a server?: No. The form, previews, and tag output are all generated in your browser. Nothing is uploaded.

Related Tools

CLAUDE.md Generator

Describe your project in 1-2 sentences and get a structured CLAUDE.md. AI-powered by Amazon Nova Micro. Free, no login.

Markdown Table Generator (AI-Powered)

Describe comparison, pricing, pros-and-cons, specs, or network lab tables in plain English and get editable Markdown. Free AI markdown table generator.

Table of Contents Generator

Generate a Markdown table of contents from your document. Free online TOC generator with anchor links.

README Generator

Generate a professional GitHub README.md. Free online README generator with templates and badges.

About SEO Meta Tag Generator (with Live Previews)

Generate SEO meta tags, Open Graph, and Twitter Card tags with live Google, X/Twitter, Facebook, and LinkedIn previews. Pixel-accurate title width, smart fallbacks, copy the whole <head> block. 100% free, in-browser. This tool runs entirely in your browser, so your content is not sent to a server. MarkdownMe provides free, fast, and reliable Markdown tools for developers, writers, and anyone who works with Markdown.