Free founder tools
Tools for launch week
Domain checks, on-page SEO, a full sitemap suite, Markdown converters, and launch utilities. No signup. URL tools fetch the public web from our server. Domain Rating is a public-web estimate, not Ahrefs DR.
- 66tools
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Featured
Start here — the checks founders run in the first hour of launch week.
- Domain Rating checkerPublic-web authority score 0–100 for any website. Not licensed Ahrefs DR.
- Website SEO checkerOn-page score and checklist for any public URL.
- Sitemap finder & checkerFind and validate sitemaps via robots.txt, with URL totals.
- Keyword generatorQuestions, commercial, comparison, and long-tail ideas.
- WHOIS lookup & domain ageRegistration date, expiry, registrar, and nameservers via RDAP.
- PageSpeed Insights checkerLighthouse scores and Core Web Vitals via Google PageSpeed.
Authority & backlinks
Check domain strength, WHOIS, and outbound link attributes before you do outreach.
- SEO compareCompare on-page SEO, titles, meta, H1, and OG tags side by side.
- Dofollow / nofollow checkerAudit outbound links and rel attributes on any page.
- Backlink value calculatorEstimate relative backlink value from rating, follow type, and traffic.
- Bulk domain ratingPaste up to 25 domains, score them, and export CSV.
Name & branding
Generate names, taglines, and clean slugs before you print the brand.
On-page & technical SEO
Titles, meta, schema, headers, DNS, SSL, email auth, and AI discovery files.
- Meta description testerCharacter and pixel estimates with a Google-style SERP snippet.
- Open Graph previewPreview Facebook and X-style cards and generate og tags.
- Word counterWords, characters, sentences, and estimated reading time.
- Title tag generatorBuild SEO title tags under ~60 characters.
- Robots.txt generatorSitemap URL, disallow paths, and optional AI-scraper blocks.
- Redirect checkerTrace 301/302/307/308 chains and the final landing URL.
- HTTP header checkerStatus, security headers, caching, and X-Robots-Tag.
- Canonical URL checkerVerify rel=canonical matches the final URL.
- Broken link checkerScan a page’s outbound links for 4xx/5xx failures.
- robots.txt testerFetch live rules, list sitemaps, and test if a path is allowed.
- DNS lookupA, AAAA, CNAME, MX, NS, TXT, and SOA records.
- SSL checkerCertificate validity, expiry, issuer, and SAN names.
- llms.txt generatorDraft llms.txt and ai.txt so answer engines can read your site.
- FAQ schema generatorTurn Q&A pairs into FAQPage JSON-LD.
- Keyword density checkerWord count, top phrases, and density % before you publish.
- Reading time calculatorMinutes-to-read at ~200 words per minute.
- OG image generatorDesign a 1200×630 Open Graph image and download PNG.
- Keyword difficulty checkerHeuristic 0–100 from length and modifiers — not Ahrefs KD.
- SERP previewGoogle snippet preview with desktop and mobile width estimates.
- Schema markup checkerExtract JSON-LD types and raw structured data.
- Heading analyzerOutline H1–H6 and flag missing or multiple H1s.
- Hreflang checkerList alternate language URLs and flag missing x-default.
- Readability checkerFlesch Reading Ease and grade level from pasted copy.
- Image alt checkerList img tags and flag missing alt attributes.
- Meta tags checkerTitle, description, robots, OG, Twitter, and every meta tag.
- Website down checkerSee if a URL is up, with HTTP status and response time.
- SPF DKIM DMARC checkerSPF, DKIM, DMARC, and MX so founder email is less likely to spam.
- 301 redirect generatorApache, Nginx, Vercel, Next.js, Netlify, and Cloudflare snippets.
- ai.txt generatorIdentity, permissions, and restrictions for answer engines.
- llms.txt validatorFetch /llms.txt and validate headings, summary, and links.
- IndexNow testerVerify your key file, then notify search engines of URL changes.
- mcp.json generatorDiscovery files for a public MCP endpoint.
Sitemap suite
Find, validate, count, extract, generate, split, merge, and compare XML sitemaps.
- Sitemap validatorFetch errors, soft limits, and bad loc/lastmod values.
- Sitemap link counterCount URLs in XML sitemaps and indexes, including gzipped files.
- Sitemap URL extractorExtract every loc URL — copy or download CSV.
- XML sitemap generatorBuild a urlset from a pasted URL list.
- Sitemap index generatorBuild a sitemapindex from child sitemap URLs.
- Sitemap split / mergeChunk large URL lists or merge several — emits an index when needed.
- Sitemap compareAdded, removed, and unchanged URLs between two sitemaps.
- Sitemap analyticsPath depth, extensions, and top prefixes.
- Sitemap frequency analyzerchangefreq and priority distributions with practical tips.
Markdown & content
Convert HTML, JSON, CSV, XML, paste, and webpages to Markdown.
- HTML to MarkdownConvert HTML to clean Markdown in the browser.
- JSON to MarkdownConvert JSON into readable Markdown lists and tables.
- CSV to MarkdownConvert CSV into a GitHub-flavoured Markdown table.
- XML to MarkdownConvert XML into structured Markdown bullets.
- Paste to MarkdownClean messy pasted text into Markdown-friendly copy.
- Webpage to MarkdownFetch a public webpage and convert its HTML to Markdown.
- Email signature generatorSimple HTML and plain-text founder signatures.
Launch week
Validate the idea, run a checklist, build UTM links, and find the ISO week.
- Validate startup ideaScorecard for problem, demand, willingness to pay, and GTM.
- SaaS launch checklistPre-launch, launch-day, and post-launch tasks for indie founders.
- UTM link builderutm_source, medium, campaign, content, and term — copy in one click.
- ISO week finderCurrent ISO week or convert any date to YYYY-Www.
- QR code generatorPNG QR for your product, UTM link, or launch page.
Recommended workflow
A short path from idea to launch week — each step opens a tool.