Free tools
Small, exact tools for the fiddly parts of putting a product in front of people. No signup and no limits. Everything but the live checks runs entirely in your browser — those fetch the URL you give them from our server, and store nothing.
Launching
Getting a product out of the door and in front of people.
- Product launch checklistThe fifteen things worth doing before, during and after a launch.
- Startup idea validatorEight questions that separate evidence from enthusiasm.
- Startup name generatorNames built from your words, not drawn from a shared list.
- Tagline generatorTagline structures built from your product, audience and outcome.
- Backlink value calculatorWhat a link is plausibly worth, with the error bars admitted.
- Open Graph image makerDraw a 1200×630 social card and download it as a PNG.
Sharing
Getting the link right before you post it anywhere.
Search
What your page looks like in a search result.
Live checks
Point these at a real URL and they fetch it for you.
- Is it down checkerCheck whether a site is down for everyone or only for you.
- HTTP header checkerEvery response header, with the security ones called out.
- Redirect checkerFollow the full redirect chain and see every hop.
- Meta tag checkerRead the live meta tags on any page and see what is missing.
- Open Graph checkerRead the live card tags and catch the one that renders worse than nothing.
- Canonical tag checkerCheck whether a page points at itself, or hands its ranking elsewhere.
- Image alt text checkerFind images with no alt attribute, and tell them apart from decorative ones.
- Dofollow and nofollow link checkerSee which outbound links pass authority and which are marked.
- Hreflang checkerCheck the hreflang set on a page for the mistakes that void it.
- On-page SEO checkerSixteen mechanical checks against a live page.
- DNS lookupEvery record for a domain, resolved through public nameservers.
- SSL certificate checkerWhat certificate a site serves, and how long it has left.
- SPF, DKIM and DMARC checkerCheck whether your domain can prove its own mail is yours.
- Broken link checkerCheck every link on a page and find the ones that no longer resolve.
- Sitemap finder and checkerFetch a live sitemap and check it against the spec.
- robots.txt testerTest whether a crawler may fetch a path, by the rules crawlers actually use.
- Webpage to MarkdownFetch any public page and get it back as clean Markdown.
- Website SEO comparisonTwo pages side by side on the signals you can actually measure.
- Schema markup checkerRead the structured data a live page is actually serving.
Technical SEO
The files at your site root that decide how it gets crawled.
- Sitemap generatorTurn a list of URLs into a valid XML sitemap.
- Sitemap index generatorTie several sitemap files together into one index.
- robots.txt generatorBuild a robots.txt, including a considered answer on AI crawlers.
- llms.txt generatorPublish a map of your site for language models.
- Redirect generatorTurn a list of old and new URLs into rules for your server.
- FAQ schema generatorTurn questions and answers into FAQPage structured data.
- Schema markup generatorGenerate JSON-LD for an organisation, app, article, product or person.
- Sitemap validatorCheck a sitemap against the spec before a crawler rejects it silently.
- Sitemap URL extractorPull the plain URL list out of a sitemap, with an optional filter.
- Sitemap URL counterHow many URLs, and which parts of the site they belong to.
- Sitemap splitter and mergerSplit one oversized sitemap into several, or merge several into one.
- Sitemap comparisonDiff two sitemaps to see exactly which URLs appeared and disappeared.
- Sitemap freshness analyzerCheck whether your lastmod dates are telling the truth.
- Sitemap structure analyzerThe shape of your site: depth, sections, priorities and hosts.
Writing
The text around the thing you are launching.
- URL slug generatorTurn a title into a clean, safe URL slug.
- Word and reading time counterWords, characters, sentences and an honest reading time.
- Readability checkerScore your writing with four formulas that disagree with each other.
- Reading time calculatorHow long your article takes, for four different kinds of reader.
- Keyword density checkerSee which terms and phrases your page actually leans on.
- Heading structure analyzerCheck your H1 to H6 outline for skipped levels and missing H1s.
- Title tag generatorTitle options from a keyword, each measured against the pixel limit.
- Meta description checkerWrite a description that fits, and says why to click.
- ISO week number calculatorWhich ISO week a date falls in, and which dates a week covers.
Converting
Moving content between formats without losing its shape.
- HTML to MarkdownPaste HTML, get clean Markdown with the links and lists intact.
- CSV to Markdown tableTurn a spreadsheet export into a Markdown table.
- JSON to MarkdownTurn a JSON array into a table, or any other JSON into a readable list.
- XML to MarkdownRead an XML document as an indented Markdown outline.
- Paste to MarkdownPaste from Google Docs or Word and keep the formatting as Markdown.
- QR code generatorMake a QR code for any link and download it at print resolution.
- Email signature generatorA signature that survives Outlook.