Free Online SEO Tools for Meta Tags
Meta tag and Open Graph generators, robots.txt and sitemap helpers, a search snippet preview, keyword density counting. Most of these are about seeing what a machine sees: where your title gets truncated in results, which tags a link scraper will actually find, whether a robots rule blocks more than you meant it to. Nothing is fetched or logged, so you can paste in a page that is not published yet.
Tools in this category
- Meta Tag Generator Generate HTML meta tags, Open Graph, and Twitter Card markup for your page <head>.
- Open Graph Generator Generate Open Graph (og:) and Twitter Card meta tags with a live link preview, image dimensions, and article/product/video fields.
- Twitter Card Generator Generate Twitter (X) Card meta tags for summary, summary_large_image, app, and player cards, with a live X card preview and all card-specific fields.
- Robots.txt Generator Generate a clean robots.txt file from simple inputs — user-agent groups with Allow/Disallow rules, crawl-delay, sitemap URLs, and one-click presets to allow all, block all, or block AI crawlers.
- Robots.txt Validator Validate a robots.txt file in your browser. Paste your robots.txt and get instant syntax checks — unknown or misspelled directives, rules placed before any User-agent, invalid Sitemap URLs, bad crawl-delay values, and more — each reported with its line number.
- Sitemap Generator Generate a valid XML sitemap from a list of URLs, with optional lastmod, changefreq, and priority — then copy or download sitemap.xml.
- Sitemap Validator Validate an XML sitemap in your browser. Paste your sitemap.xml and get instant checks — XML well-formedness, correct <urlset>/<url>/<loc> structure, absolute <loc> URLs, valid W3C/ISO 8601 <lastmod> dates, allowed <changefreq> values, <priority> within 0.0–1.0, and the 50,000-URL / 50MB limits — each problem reported as an error or warning with context.
- Canonical URL Generator Generate a clean canonical URL and a ready-to-paste <link rel="canonical"> tag. Paste any messy URL and normalize it in your browser: force HTTPS, force or strip www, lowercase the host, remove tracking parameters (utm_*, gclid, fbclid and more), sort or drop query parameters, strip the trailing slash, remove index.html, and drop the #fragment — then copy both the canonical URL and the HTML tag.
- Schema Markup Generator Generate JSON-LD structured data (schema.org) for your website. Pick a schema type — Organization, LocalBusiness, Article, Product, Person, Event, FAQPage or BreadcrumbList — fill in the fields, and copy a ready-to-paste script type application/ld+json block. Everything runs in your browser; nothing is uploaded.
- UTM Builder Build trackable campaign URLs with UTM parameters for Google Analytics.
- UTM Parser Paste a URL to extract and read its UTM parameters and other query strings.
- Link Analyzer Paste HTML or a list of URLs to extract every link and audit internal vs external, rel attributes, anchor text, and more.
- Google Snippet Preview Preview how your page title, URL, and meta description will look in Google search results, with live pixel-width truncation for desktop and mobile.
- HTML Minifier Minify and compress HTML by removing comments and extra whitespace, while keeping content inside pre, textarea, script, and style tags intact.
- CSS Minifier Minify and compress CSS by stripping comments and collapsing whitespace, while preserving string contents and url() values, with a byte-savings summary.
- JavaScript Minifier Minify and compress JavaScript with Terser: safely remove comments and whitespace, optionally shorten variable names, and see the exact bytes saved — all in your browser.