SEO & web
Meta tags, sitemaps, schema markup, UTM links and SERP previews.
15 free tools · each done in 3 steps · nothing uploaded
Meta Tag GeneratorWrite SEO title and meta description with live pixel-width checks, then copy a ready <head> snippet with robots, canonical, Open Graph and X tags.Open Graph PreviewSee how your link will look when shared on Facebook, X, LinkedIn and Slack. Enter tags or paste page HTML, and get warnings for missing og: tags.Robots.txt Generator & TesterBuild a robots.txt with user-agent groups, sitemaps and one-click AI crawler blocking (GPTBot, ClaudeBot, CCBot…), then test any URL against it.XML Sitemap GeneratorPaste a list of URLs and get a valid sitemap.xml with optional lastmod, changefreq and priority. Validates URLs and auto-splits over 50,000.Schema Markup GeneratorGenerate JSON-LD structured data for Article, FAQ, HowTo, Product, LocalBusiness, Organization, Breadcrumbs and Event, with required-field checks.UTM Link BuilderBuild UTM-tagged campaign links for Google Analytics: consistent lower-case values, bulk tagging and saved presets for your common channels.URL ParserBreak any URL into protocol, host, port, path, query parameters and fragment. Edit, add or strip parameters and rebuild the link instantly.HTTP Header CheckerOnlineSee the HTTP status and response headers for any URL, follow redirects, and audit security headers like HSTS, CSP and X-Content-Type-Options.SSL Certificate CheckerOnlineCheck any site’s SSL/TLS certificate: expiry date and days left, issuer, covered domain names (SANs), chain, protocol and hostname match.Redirect CheckerOnlineTrace every redirect hop from a URL to its final destination with status codes (301, 302, 307, 308) and timings. Spot chains, loops and HTTPS downgrades.DNS LookupOnlineLook up A, AAAA, CNAME, MX, TXT, NS, SOA and CAA records for any domain over encrypted DNS-over-HTTPS. Check SPF, DMARC and DNS changes fast.SERP Snippet PreviewPreview how your title, URL and meta description look in Google on desktop and mobile, with pixel-accurate truncation, dates and breadcrumbs.Canonical Tag Generator & CheckerGenerate a clean rel=canonical tag, and paste page HTML to catch canonical conflicts: duplicates, noindex clashes, relative URLs and og:url mismatches.Hreflang Tag Generator & ValidatorGenerate hreflang link tags or sitemap entries for multilingual sites with language and region pickers, x-default, and reciprocal return-link checks.Social Media Image Size Guide & ResizerCurrent recommended image sizes for Instagram, Facebook, X, LinkedIn, YouTube, TikTok and Pinterest, plus a built-in crop and resize to any preset.