About 1 in 200 Million

1 in 200 Million (1in200m.site) is a free site checkup before your link spreads. Put in a site's address and it opens the site in a real browser at phone size (390px), presses the share button, and checks 50+ things across link previews, sharing, https and search. You get an item score out of 100, where the site stands among every site checked so far (top N%), and a prescription: what to fix, in order, and how. No sign-up; it usually takes about 20 seconds.

Who is it for?

Makers who build a web service alone or in a small team and want the link to spread. Many of the sites it checks were made with AI coding tools (Claude Code, Cursor, ChatGPT and others), and the prescription is written so you can hand it straight to one.

What does it check?

• Link previews (20 pts): whether the og:image opens, its size, ratio, file size and absolute URL, title and description length, og:url, whether the KakaoTalk, Facebook and X preview bots get in, and the large X card
• Sharing (19 pts): whether pressing the share button really brings people back to this site, the phone share sheet, copying the link, a result image, KakaoTalk, X and Threads, and whether inner pages get their own previews
• The way in (17 pts): https, how much the first visit downloads and how long it takes, the phone layout, a login wall on the first screen, Google sign-in blocked inside in-app browsers, errors on load
• Search and basics (7 pts): text in the HTML and the h1, noindex, robots.txt, canonical URL, sitemap, language, structured data, icons and the manifest
• Pre-spread check (7 pts): your own domain, the free plan’s wall you hit first when people rush in, a place for feedback, a privacy policy
• What people will like (30 pts): judged by AI from the first screen, the preview image and the text: seven questions, such as whether it is clear within 3 seconds what the site does, whether each person gets their own result, and whether you can try it without signing up.

How is the score made?

70 points come from fixed rules and are always the same; 30 points are judged by AI against set criteria, so the same site can vary a little. That item score out of 100 is then placed on the spread of every site checked so far, which gives a bell-curve score (the middle is 60) and a "top N%". About ten small sites made by one person that spread widely are checked the same way every week, and the curve is set so their middle sits at the top 5%: to pass 80, a site has to be close to them. Each site counts once, with its latest score.

My link preview doesn't show on X, Facebook or KakaoTalk. Why?

Usually the page has no og:image or og:title, the image URL is relative, or a firewall keeps the preview bots out. 1 in 200 Million goes in with the KakaoTalk, Facebook and X preview bots' own names and tells you what is missing. Apps keep a preview they have read: if an old image still shows after you changed it, add ?v=2 to the end of the image URL.

Does a simple intro page need a privacy policy and terms of service?

You need a privacy policy as soon as the page has any of these: visit analytics (Google Analytics and the like), a contact form, live chat, sign-in, payments or ads. Most privacy laws (the GDPR in Europe, the CCPA in California, the PIPA in Korea) ask you to say what you collect. A page that collects nothing does not strictly need one, but adding any of those changes that. It should say what you collect, why, how long you keep it and when you delete it, who handles it for you, whether you pass it on, whether you use cookies and how to turn them off, how people can see or delete their data, and a contact and an effective date. Terms of service matter when there are accounts, payments or posts; with payments, also show who is selling and how to reach them. 1 in 200 Million finds these in the site's code and tells you whether a privacy policy is needed and whether you have one. This is general information, not legal advice.

Does it check what AI-made (vibe-coded) sites often miss?

Yes, separately from the score: secret keys in browser code (OpenAI, Stripe and others), AI APIs called straight from the browser, requests and files that fail on load, errors on load, leftover localhost addresses, example values never filled in, template defaults, development builds and public source maps. Each comes with a plain explanation and one line to give your AI coding tool. For secret keys we only say which service they belong to; the key itself is never kept.

What is free and what is paid?

The checkup, the score, the prescription, the AI specialist's note and ideas, the diagnosis certificate card about what your site does well, and the leaderboard are free. Only Specialist Care, which prescribes what people will like for this site (the AI’s 30 points: who wants it, whether the topic spreads, angles to spread further) and makes the fixes and the launch material for you, is paid: one payment per site, open for a year (US$4.99 · ¥750 · ₩6,900). Within 30 days of paying, we refund in full with no questions asked.

What does the AI do?

Anthropic's Claude writes the 30-point part and the note, ideas and sharing plan fitted to each site, from the checkup results, some text of the first screen, a phone screenshot and the preview image. Text hidden in a page to tell the AI to change the score is left out, and such a site gets only half of that part.

What is kept?

Page text and screens are not stored; the same address shows the same result for 10 minutes. For the score curve we keep, per site, a hash of its address and its latest score, deleted after a year without a new checkup. Nothing about people is collected. Details are in the privacy policy.

What is the leaderboard?

A list of sites their owners added themselves, with each one's score and what it does well. Adding a site takes one verification tag on its front page; removing the tag takes it off. Other makers try the sites and leave reactions and one-line feedback.

Why "1 in 200 Million"?

There are about 217 million active websites today (Netcraft Web Server Survey, July 2026). The name is about helping yours become the one people pass along.

Who runs it?

Jin's Earth, the maker of the life simulation 1 in 8 Billion (1in8b.life), runs it together with that site. What happened when 1 in 8 Billion spread is the basis of this checkup. Contact: contact@1in8b.life; ideas and fixes: Send feedback.

What is the official address, and which languages?

The only official address is 1in200m.site. It is in English at 1in200m.site/en/, in Korean at 1in200m.site and in Japanese at 1in200m.site/ja/, and the AI writes in the language of the edition you use.