Meta Tag Generator, HTML, Open Graph & Twitter Card

This is a deterministic template generator, not a numeric calculator: every tag is a pure function of what you type. It follows four specifications, the Open Graph Protocol (ogp.me), the X (Twitter) Cards documentation, Google Search Central, and the WHATWG HTML standard, and emits tags in a sensible <head> order.

1. Sanitise inputs. Every value is HTML-escaped (&, <, >, ") so a title containing punctuation can never break the markup. Whitespace is trimmed and your X handle is normalised to a single leading @.
2. Core HTML tags. With the charset option on, it outputs <meta charset="utf-8"> and the viewport meta first, then the title, meta description and canonical link.
3. Robots directive. Your index/noindex and follow/nofollow choices are joined into a single supported <meta name="robots"> value. Only tokens Google documents are offered.
4. Open Graph block. The four properties ogp.me marks required, og:title, og:type, og:url and og:image, are emitted, with og:image dropped (and a warning shown) when no image URL is given. og:description, og:site_name and og:locale are added when present.
5. Twitter/X block. Because X falls back to Open Graph, only a few Twitter tags are written, the card type, title, description and image, so they never contradict the OG block.
6. Length checks. Title and description meters compare character count against thresholds from Google's title-link and snippet guidance (title green up to 60, description ideal 140–160). Google actually measures pixel width, so these are advisory heuristics, not guarantees.

As a credibility cross-check, the generated string is then independently re-parsed: the tool counts the emitted <meta>/<link>/<title> tags and confirms which of the four required Open Graph properties are present. That re-parse must agree with the validation panel, if og:image is missing, both flag it.

• The Open Graph Protocol: ogp.me (required/optional properties, og:type vocabulary)
• X (Twitter) Cards: markup, card types and Open Graph fallback
• Google Search Central: title links and snippet length guidance
• Google Search Central: robots meta tag (supported directives)
• WHATWG HTML Standard: the meta element, charset and viewport

The tag set, required-property list and length heuristics were last cross-checked against these sources on 2026-06-25. Validate your live page afterwards with the official Facebook Sharing Debugger and X Card Validator.