Tool directory
Every tool is free, rate-limited, and logged for abuse protection — not behind a paywall.
AI and LLM visibility
Generate an llms.txt file for AI crawlers.
Generate a longer llms-full.txt guide.
Fetch and validate llms.txt / llms-full.txt.
robots.txt matrix for major AI bots.
Combined robots and llms.txt overview.
Professional substance audit: thinness, boilerplate, filler, specificity, diversity, experience, and trust cues — not authorship detection.
Turn a topic into intent-grouped conversational queries, content angles, and an AEO brief.
Estimate tokens and USD cost across major LLM APIs with caching, batch, volume, and model comparison.
Audit whether a page is easy for assistants to trust and cite: entity, schema, author, answer-first content, llms.txt, and optional AI-answer citation extract.
Scan author identity plus Experience, Expertise, Authoritativeness, and Trustworthiness signals — not an indexability checker.
Performance and page weight
Estimate HTML + sampled asset transfer weight.
Probe gzip/Brotli Content-Encoding with Accept-Encoding negotiation.
Find potentially render-blocking CSS/JS in the HTML.
Flag font-display, preload, and web-font patterns that risk CLS.
Indexation and crawl
Combine robots, meta robots, and canonical signals.
Fetch and test robots.txt rules.
Generate a robots.txt from options.
Follow HTTP redirects safely.
Inspect canonical link tags and headers.
Validate sitemap structure and sample URLs.
Generate a capped URL sitemap.
Sample potential crawl waste patterns.
Hard-capped internal link sampler.
Queued fetch/render comparison.
Check pre-render signals for bots.
Inspect response headers for a URL.
On-page and content substance
Estimate main content vs template chrome for extractability.
Flag thin-body risk with structure and intent-aware notes.
H1–H6 outline with hierarchy and accessibility checks.
Word counts, n-grams, reading time, optional keyword density.
Flesch, Flesch–Kincaid, Gunning Fog, and Coleman–Liau with guidance.
Title/description SERP preview with approximate pixel budgets.
Capped broken-link check for one page.
Alt text, filenames, dimensions, and lazy-loading heuristics.
Analyze slug readability, length, and hygiene.
Side-by-side metadata and on-page signal compare.
Fetch up to 25 URLs and flag duplicate titles/descriptions.
Schema and structured data
Parse and validate JSON-LD blocks, types, and primary page schema.
Heuristic Google rich-result eligibility by required properties.
Generate production-ready starter JSON-LD for common types.
Compare JSON-LD types and properties between two URLs.
Detect microdata and convert itemscope graphs to JSON-LD.
Parse and summarize an RSS/Atom feed.
Network DNS hub
Email authentication hub
WHOIS / RDAP
Technical and security
Heuristic .htaccess review and common rewrite patterns.
Generate Apache/Nginx redirect rules.
Certificate provider (CA), expiry, SANs, name match, and TLS session details.
Grade HSTS, CSP, XFO, and related headers.
Find http assets on https pages.
Viewport heuristics plus a phone-frame live preview.
Mobile-first indexing checklist with phone-frame preview.
International and local
Check locale/language signals on a page.
Validate hreflang alternate link tags.
Generate hreflang sitemap XML from lang,URL rows.
Format NAP + LocalBusiness JSON-LD.
Compare structured NAP fields to pasted directory text.
Local SEO checklist and query ideas.
Generate common review profile links.
Generators and utilities
Generate title/description/meta tags.
OG/Twitter card markup with previews.
Build CSV + Apache/Nginx redirect maps.
Visual SERP snippet simulator with pixel budgets.
Unicode social styles, platform character limits, and self-hosted font previews.
Characters, words, graphemes, bytes, and social platform limit meters.
Strong passwords with length, charset checkboxes, and strength scoring.
Generate UUIDs and API key strings with one-click copy.
Mobile and UX
Marketing and campaigns
Build campaign URLs with UTM parameters or audit a list of links for missing tags.
Scan a page for GA4, GTM, Meta Pixel, Google Ads, LinkedIn, and TikTok tags.
Find a public Facebook Page ID or Instagram user ID from a profile URL — not Business Manager ID.
Check Google Ads and Meta ad copy against common UI truncation budgets.
Preview subject truncation, flag spammy phrasing, and check preheader length.
Pooled two-proportion z-test with lift, 95% CI, and sample-size adequacy checks.
Contribution-margin break-even ROAS, CPA, and target CPA for desired profit.
Simple lifespan or churn-based contribution LTV, CAC, ratio, and payback months.
Estimate revenue at risk from abandoned carts and +1pp completion recovery.
Remove duplicate lines with trim, casefold, and sort options.
Match width×height to common feed, story/reel, and card aspect presets.
Estimate spoken timing at 120–180 WPM and flag hooks longer than 3 seconds.