Free SEO Meta Tag & Schema Generator – Generate JSON-LD, Open Graph & Meta Tags
Free SEO Meta Tag & Schema Generator
Build clean, valid meta tags, Open Graph & Twitter Card markup, and JSON-LD structured data for your page — entirely in your browser, with a live search and social preview.
1. Page Basics
2. Open Graph & Twitter/X Card
3. JSON-LD Schema
Live Preview
Search Preview
Facebook / Open Graph Preview
X / Twitter Preview
SEO Health Check
Generated Code
Table of Contents
What Is an SEO Meta Tag & Schema Generator?
This tool helps you put together the HTML meta tags, Open Graph tags, Twitter/X card tags, and JSON-LD structured data that a page needs, without hand-writing any of it. You fill in details about your page — title, description, image, author, dates — and the tool assembles the corresponding markup on the fly, right in your browser. Nothing you type is sent anywhere; the generation happens entirely on your device.
Why Meta Tags Still Matter
Meta tags don't control rankings directly, but they shape how your page is understood and how it's presented. A title tag is usually what shows as the clickable headline in a search result, and the meta description often becomes the summary text underneath it. A canonical link tells search engines which URL is the authoritative version when similar content exists at more than one address, and a robots directive tells them whether the page should be indexed at all. Getting these basics right is one of the simplest, lowest-risk things you can do for a page.
What Is Schema Markup (JSON-LD)?
Schema markup is a standardized vocabulary, maintained by Schema.org, for describing what's on a page in a way machines can parse. JSON-LD is simply the format most sites use to add that description — a small script block containing structured, labeled data rather than plain prose. Search engines can use it to better understand entities like articles, FAQs, breadcrumbs, organizations, and local businesses. It's worth being clear about what schema does and doesn't do: adding it can help a page be understood correctly, but it does not guarantee rich results or better rankings. Google's own documentation at Search Central is the most reliable place to confirm current eligibility requirements for any particular rich result.
Open Graph & Twitter/X Cards
Open Graph tags control how a link looks when it's shared on platforms like Facebook or LinkedIn — the image, headline, and summary that appear in the shared card. Twitter/X uses a related but separate set of tags, and it falls back to Open Graph values for anything it doesn't have its own tag for. Without these, a shared link often displays with a blank image or a distorted excerpt of the page pulled at random, so filling them in deliberately gives you control over your first impression on social platforms.
How to Use This Tool
Start with the Page Basics section: enter a title, a description, and the exact URL of the page. Move on to Open Graph and Twitter fields if you want control over how the page looks when shared. Then choose a schema type that matches the page — a blog post usually wants Article or BlogPosting, a homepage often wants WebSite, and a support page might want FAQPage. Fill in only the fields that apply; anything left blank is simply omitted from the output rather than filled in with a placeholder. Watch the live preview and SEO health panel update as you type, then copy the tab you need or grab everything at once from the Combined tab.
Example Output
| Field | What You Enter | What Gets Generated |
|---|---|---|
| Page Title | Free Age Calculator Online | <title> and matching og:title / twitter:title |
| Meta Description | Calculate your exact age in years, months and days. | <meta name="description">, og:description, twitter:description |
| Schema Type: FAQPage | 2+ question/answer pairs | Valid FAQPage JSON-LD with a mainEntity array |
Common Mistakes to Avoid
- Writing a title so long it gets cut off in search results.
- Leaving the meta description blank and letting it be auto-generated unpredictably.
- Adding FAQ schema for questions that aren't actually visible as text on the page.
- Mixing unrelated schema types into a single object instead of using separate, valid structures.
- Forgetting to update
dateModifiedwhen an article is substantially revised.
Limitations You Should Know
This tool checks that your JSON-LD is syntactically valid and that required fields are present, but it can't verify that the information you enter is factually accurate, nor can it guarantee how any particular search engine will choose to display your page. Rich results, sitelinks, and other enhanced listings are decided by the search engine itself and can change over time. Treat generated schema as an accurate machine-readable description of your content, not as a ranking lever.
Frequently Asked Questions
Is this SEO tool really free to use?
Yes. Everything runs in your browser with no account, no API key, and no payment required.
Does adding schema markup guarantee rich results in Google?
No. Structured data helps search engines understand your content, but eligibility for rich results depends on the search engine's own criteria and can change at any time.
What's the difference between Open Graph and Twitter Card tags?
Open Graph is a broader standard used by Facebook, LinkedIn, and many other platforms. Twitter/X has its own tag set but automatically falls back to Open Graph values for any tag it's missing.
Why does the tool skip some fields in the generated code?
Empty fields are intentionally left out rather than filled with placeholder text, since publishing fake or empty values can create misleading markup.
Can I generate more than one schema type for the same page?
Yes — switch the Schema Type dropdown, fill in the relevant fields, and copy each schema's code separately. Add each one as its own <script type="application/ld+json"> block.
How long should my meta title and description be?
A commonly used guideline is roughly 50–60 characters for the title and 120–160 characters for the description, though actual display length varies by device and search engine.
Will this tool work if I paste it into Blogger?
Yes. It's built with plain HTML, CSS, and vanilla JavaScript with a unique naming prefix, so it's designed to work after being pasted into a Blogger post or page and published.
What happens if I enter an invalid URL or image link?
The affected field is highlighted with a clear error message, and that value is excluded from the generated markup until it's corrected.
Can I use this on mobile?
Yes, the layout adjusts for narrow screens, and all inputs, tabs, and buttons remain usable on a phone.
Does the tool store or send my data anywhere?
No. All generation happens locally in your browser; nothing you type is transmitted to a server by this tool.
Related Tools
Conclusion
Good on-page SEO starts with getting the fundamentals right: an accurate title, a genuinely descriptive summary, correct social preview tags, and structured data that actually matches what's on the page. This generator handles the repetitive, error-prone parts of writing that markup by hand, so you can focus on the content itself and copy out clean, valid code whenever you need it.
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