promopilot

Check HTTP security headers from the command line: HSTS, Content-Security-Policy quality, X-Content-Type-Options, clickjacking protection, Referrer-Policy, Permissions-Policy, COOP, cookie flags and version leaks, with a 0-100 score and A-F grade. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Validate schema.org JSON-LD from the command line: JSON syntax, @context, required and recommended properties for Google rich result types (Product, Offer, Article, FAQPage, BreadcrumbList, Organization, LocalBusiness, Event, Recipe, VideoObject, JobPosting…), ISO dates and durations, prices, currencies and URLs. Zero-dependency Node.

Look up MX records from the command line: mail servers by priority, IPv4/IPv6 addresses, reverse DNS, mail provider detection and broken setups (no MX, null MX, CNAME or IP targets, unresolvable hosts). Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Audit SEO meta tags from the command line: title and description length, meta robots and X-Robots-Tag noindex, canonical, viewport, lang, charset, H1, hreflang, Open Graph and Twitter cards. Works on live URLs or local HTML. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Check BIMI from the command line: the default._bimi record, DMARC enforcement, the SVG Tiny PS logo rules and the VMC/CMC mark certificate (type, subject, expiry). Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Generate robots.txt from the command line or code: presets for WordPress, WooCommerce, Shopify, Magento, Next.js, Laravel and staging sites, custom Allow/Disallow rules, sitemaps, crawl-delay, one-flag blocking of 20 AI crawlers (GPTBot, ClaudeBot, Google-Extended, CCBot…) and SEO bots, with built-in lint. Zero-dependency Node.

Debug Open Graph and Twitter Card tags from the command line: fetches the page as the Facebook crawler, shows the Facebook, LinkedIn and X previews with fallbacks, and checks the share image (format, 1200x630 size, ratio, weight), og:url vs canonical and missing tags. Zero-dependency Node.js CLI, library and GitHub Action.

Validate robots.txt from the command line and test whether URLs are allowed for Googlebot, Bingbot or any user agent, with RFC 9309 matching (wildcards, $, longest match). Flags SEO mistakes like blocked CSS/JS or Disallow: /. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Validate SPF records from the command line: syntax, +all/?all, ptr, multiple records, include loops and the 10-DNS-lookup limit, with a full include tree. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Check a page for broken links from the command line: every link (and optionally images, scripts, stylesheets and iframes) is requested in parallel with HEAD/GET fallback, reporting 4xx/5xx, timeouts, DNS failures, invalid URLs and redirects, with the anchor text that needs fixing. Zero-dependency Node.js CLI, library and GitHub Action.

Build and validate UTM-tagged URLs from the command line: consistent lowercase values, batch tagging from a file, and checks for missing source/medium/campaign, uppercase keys, duplicates, spaces and mediums GA4 cannot classify. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Preview Google search snippets from the command line: measures titles and meta descriptions in pixels with Arial metrics, shows the truncation point for desktop and mobile, and flags missing, generic or cut-off snippets. Works on live URLs or plain text, with an HTML preview export. Zero-dependency Node.js CLI, library and GitHub Action.

Validate XML sitemaps from the command line: discovery via robots.txt, sitemap indexes, .xml.gz, protocol limits (50,000 URLs / 50 MB), lastmod, priority, changefreq, foreign hosts, duplicates and optional status checks of listed URLs. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Analyse keyword density from the command line: top words and 2-3 word phrases of a web page, HTML file or plain text with counts and density, stop words for English, Ukrainian, Russian, Polish and German, and a target keyword check (density, title, H1, description, first 100 words). Zero-dependency Node.js CLI, library and GitHub Action.

Check DKIM public keys from the command line: finds selectors of common mail providers, decodes RSA/Ed25519 keys, reports key length, revoked and testing keys and syntax errors. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Trace redirect chains from the command line: every hop with 301/302/307/308 status, timing and meta refresh, plus loops, long chains, HTTPS downgrades, temporary redirects and broken final URLs. Bulk mode for migrations. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Check SSL/TLS certificates from the command line: days until expiry, host name and wildcard match, missing intermediates, untrusted and self-signed certificates, key size, TLS version, cipher and ALPN. Bulk mode and expiry alerts for CI. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.

Detect and remove hidden characters in text: zero-width spaces, narrow no-break spaces, bidi controls, Unicode tag 'ASCII smuggling', homoglyphs. CLI + library for ChatGPT/AI text, CMS content and code review. By PromoPilot.

Check a website's favicons from the command line: <link rel=icon>, apple-touch-icon, web manifest icons and /favicon.ico — real sizes, broken files, Google's 48px rule. Zero-dependency Node.js CLI and library. Free online version by PromoPilot.

Validate DMARC records from the command line: policy strength, pct, alignment, rua/ruf report addresses and external-destination authorization. Zero-dependency Node.js CLI, library and GitHub Action. Free online version by PromoPilot.