73 free SEO & launch tools

Domain Rating checkerpopular

Live Ahrefs Domain Rating (0–100) for any website.

Bulk DR checker

Up to 25 domains at once, sorted by DR, export CSV.

SEO compare

Two sites side by side: on-page score, titles, meta, H1, OG and schema.

Dofollow / nofollow checker

Every link on a page with its rel attributes, internal vs external.

Backlink value calculator

Relative value of a link from DR, follow type, traffic and placement.

WHOIS & domain age

Registration date, age, expiry, registrar and nameservers via RDAP.

Startup name generatorpopular

Brandable names from keywords, with live .com availability.

Tagline generator

Hero taglines from your product name and what it does.

URL slug generator

Clean, SEO-friendly slugs from any title, in bulk.

Favicon generator

PNG favicons from initials or an emoji at 16, 32, 180 and 512.

Website SEO checkerpopular

On-page score and a prioritized checklist for any URL.

Meta tags checker

Title, description, robots, canonical, Open Graph and Twitter tags.

Meta description tester

Length, pixel width and a live Google snippet preview.

Title tag generator

SEO titles under 60 characters from a keyword and brand.

SERP preview

See your title, URL and description as Google shows them.

Open Graph preview

How any URL's link card looks on X, Facebook, LinkedIn and Slack.

OG image generator

Design a 1200×630 social card in the browser and download a PNG.

Heading analyzer

H1–H6 outline of any page; flags missing, multiple or skipped levels.

Image alt checker

Every image on a page, with missing or weak alt text flagged.

Keyword generatorpopular

Question, commercial, comparison and long-tail ideas from a seed.

Keyword difficulty estimator

A quick 0–100 heuristic from length, intent and modifiers.

Keyword density checker

Top words and 2–3 word phrases with density, from text or a URL.

Word counter

Words, characters, sentences, paragraphs and reading time.

Reading time calculator

Minutes to read and to speak, at adjustable speeds.

Readability checker

Flesch reading ease, grade level and the hardest sentences.

Redirect checker

Trace every 301/302/307/308 hop to the final URL.

HTTP header checker

Status, caching and security headers with a grade.

Canonical URL checker

Does the canonical match the final URL? Catches common mistakes.

Broken link checker

Checks up to 60 links on a page for 4xx/5xx and timeouts.

robots.txt tester

Fetch live rules and test whether a path is allowed for any bot.

robots.txt generator

Sitemap line, disallow paths and optional AI-crawler rules.

Hreflang checker

Alternate-language URLs, x-default and return-link sanity.

DNS lookup

A, AAAA, CNAME, MX, NS, TXT and SOA records.

SSL checker

Certificate validity, days to expiry, issuer and SAN names.

Is it down?

Is a site up right now — status, response time, final URL.

PageSpeed checker

Lighthouse scores and Core Web Vitals, mobile and desktop.

301 redirect generator

Redirect rules for Apache, Nginx, Vercel, Next.js, Netlify and Cloudflare.

IndexNow tester

Verify your key file and ping Bing, Yandex and friends with new URLs.

GEO / AI citation checkerpopular

llms.txt, ai.txt, AI-crawler rules, JSON-LD and markdown readiness.

llms.txt generator

Generate llms.txt from your site so answer engines understand it.

llms.txt validator

Fetch /llms.txt and check its title, summary, sections and links.

ai.txt generator

Identity, permissions and restrictions for AI agents and crawlers.

Schema markup checker

Every JSON-LD and microdata type on a page, with parse errors.

FAQ schema generator

Q&A pairs → valid FAQPage JSON-LD, ready to paste.

mcp.json generator

Discovery file for a public MCP server endpoint.

Sitemap finder & checker

Discover sitemaps via robots.txt and common paths, then validate.

Sitemap validator

Fetch errors, soft limits, bad loc/lastmod/priority values.

Sitemap link counter

Count URLs across sitemaps and sitemap indexes, gzipped too.

Sitemap URL extractor

Pull every <loc> — copy or download as CSV.

Sitemap analytics

URL patterns, path depth, top sections and lastmod freshness.

Sitemap frequency analyzer

changefreq and priority distributions across a sitemap.

Sitemap compare

Added, removed and unchanged URLs between two sitemaps.

XML sitemap generator

A urlset from a pasted URL list, with lastmod and priority.

Sitemap index generator

A sitemapindex file from a list of child sitemaps.

Sitemap split / merge

Split big URL lists into 50k chunks or merge several into one.

Webpage → Markdown

Fetch any public page and get clean Markdown of the main content.

HTML → Markdown

Paste HTML, get clean Markdown — runs in your browser.

JSON → Markdown

Objects become lists, arrays of objects become tables.

CSV → Markdown table

CSV or TSV into a GitHub-flavored Markdown table.

XML → Markdown

XML documents into nested Markdown bullets.

Paste → Markdown

Paste from Docs, Notion or a web page; keep the formatting as Markdown.

Privacy policy generator

Markdown privacy policy draft for a SaaS. Not legal advice.

Terms of service generator

Markdown terms draft for a SaaS. Not legal advice.

Cookie policy generator

Cookie policy draft for essential and analytics cookies.

Email signature generator

HTML and plain-text signatures that render in every client.

SPF, DKIM & DMARC checker

MX, SPF, DMARC and common DKIM selectors — so your emails land.

Validate startup ideapopular

Score problem, demand, willingness to pay and go-to-market.

SaaS launch checklist

Pre-launch, launch day and post-launch — saved in your browser.

UTM link builder

Campaign URLs with source, medium, campaign, content and term.

QR code generator

PNG or SVG QR codes for your product or UTM link.

Press kit generator

Boilerplate, fact sheet, founder quote and badge snippet.

ISO week finder

Any date → YYYY-Www, the calendar weekly launches use.

Show HN title scorer

Prefix, length, clarity and hype-word checks for your HN post.