On-page SEO tools that run in your browser.

Free on-page SEO tools: generate meta tags, robots.txt and structured data, and check markup. Everything runs locally in your browser — nothing is uploaded.

Schema markup

Article Schema GeneratorBuild Article JSON-LD with dates that validate.Breadcrumb Schema GeneratorBuild a BreadcrumbList trail that validates.Event Schema GeneratorEvent JSON-LD, with the location the mode requires.FAQ Schema GeneratorTurn question and answer pairs into FAQPage JSON-LD.HowTo Schema GeneratorHowTo JSON-LD with steps, supplies and tools.Job Posting Schema GeneratorJobPosting JSON-LD with salary and remote rules.Local Business Schema GeneratorLocalBusiness JSON-LD for a single branch.Organization Schema GeneratorOne company entity, with sameAs and a stable @id.Product Schema GeneratorBuild Product JSON-LD with a valid Offer.Recipe Schema GeneratorRecipe JSON-LD with times, steps and nutrition.Structured Data ValidatorCheck JSON-LD syntax, types and required fields in your browser.Video Schema GeneratorVideoObject JSON-LD with key moments.

Crawling & indexing

Canonical Tag GeneratorNormalise a URL into a rel=canonical line.Hreflang Tag GeneratorBuild a reciprocal hreflang set for every language version.Htaccess Redirect GeneratorRedirect rules for Apache and Nginx, side by side.Meta Robots Tag GeneratorBuild robots directives as a meta tag or an X-Robots-Tag header.Robots.txt GeneratorBuild robots.txt with presets and warnings.Robots.txt ValidatorValidate robots.txt and test whether a URL is blocked.XML Sitemap GeneratorTurn a list of URLs into a valid sitemap.xml.

Meta & social tags

Meta Tag AnalyzerReads the head of pasted HTML and grades every tag in it.Meta Tag GeneratorBuild head tags with a live Google preview.Open Graph GeneratorWrite og: tags and read the card before you share.SERP Snippet PreviewSee the Google result before you publish it, measured in pixels.

Page audits

Deprecated HTML Tags CheckerFind obsolete elements and presentational attributes in pasted markup.Google Analytics CheckerFind GA4, GTM and legacy UA tags and what is wrong with them.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.Media Query CheckerList your CSS breakpoints and find overlaps and gaps.Mixed Content CheckerFind the http:// resources breaking the padlock on an HTTPS page.SEO Word CounterKeyphrase density, placement and long sentences in a draft.

Images & performance

DOM Size CheckerCount elements, depth and inline bytes in pasted page source.Favicon GeneratorEvery favicon file a site needs, built in your browser.Image CompressorShrink images for the web without uploading them.Webp ConverterBatch-convert images to WebP without uploading them.

Email, DNS & marketing

Ads.txt GeneratorGenerate and validate the IAB ads.txt file for your domain.Email ObfuscatorEncode mailto links and find exposed emails in HTML.SPF Record GeneratorCompose an SPF TXT record and watch the ten-lookup budget.UTM BuilderTag campaign links without breaking the URL you started with.

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