On-page SEO tools that run in your browser.
Free on-page SEO tools: generate meta tags, robots.txt and structured data, and check your markup. Everything runs locally in your browser — nothing is uploaded.
Generators
Ads.txt GeneratorGenerate and validate the IAB ads.txt file for your domain.Article Schema GeneratorBuild Article JSON-LD with dates that validate.Breadcrumb Schema GeneratorBuild a BreadcrumbList trail that validates.Canonical Tag GeneratorNormalise a URL into a rel=canonical line.Event Schema GeneratorEvent JSON-LD, with the location the mode requires.FAQ Schema GeneratorTurn question and answer pairs into FAQPage JSON-LD.Hreflang Tag GeneratorBuild a reciprocal hreflang set for every language version.Htaccess Redirect GeneratorRedirect rules for Apache and Nginx, side by side.Local Business Schema GeneratorLocalBusiness JSON-LD for a single branch.Meta Robots Tag GeneratorBuild robots directives as a meta tag or an X-Robots-Tag header.Meta Tag GeneratorBuild head tags with a live Google preview.Open Graph GeneratorWrite og: tags and read the card before you share.Organization Schema GeneratorOne company entity, with sameAs and a stable @id.Product Schema GeneratorBuild Product JSON-LD with a valid Offer.Robots.txt GeneratorBuild robots.txt with presets and warnings.SPF Record GeneratorCompose an SPF TXT record and watch the ten-lookup budget.UTM BuilderTag campaign links without breaking the URL you started with.XML Sitemap GeneratorTurn a list of URLs into a valid sitemap.xml.
Checkers
Deprecated HTML Tags CheckerFind obsolete elements and presentational attributes in pasted markup.DOM Size CheckerCount elements, depth and inline bytes in pasted page source.Heading Structure CheckerThe H1 to H6 tree of pasted HTML, with skipped levels flagged.Image Alt Text CheckerEvery img tag in pasted HTML, with its alt text judged.Link Attributes CheckerAudit rel, target and anchor text across every link in pasted markup.Meta Tag AnalyzerReads the head of pasted HTML and grades every tag in it.Mixed Content CheckerFind the http:// resources breaking the padlock on an HTTPS page.SEO Word CounterWord count, keyphrase density and readability signals.SERP Snippet PreviewSee the Google result before you publish it, measured in pixels.Structured Data ValidatorCheck JSON-LD syntax, types and required fields in your browser.
Cannot find the tool you need?
The catalogue grows from what people ask for. Tell us which tool is missing and what it would save you.