A site checkup before your link spreads
Is your site
ready to spread?
Put in an address. We open it on a phone, even tap the share button, and check 50+ things, from link previews to https and search. You get checkup results and a free prescription.
Free · No sign-up · Usually 20 seconds
- IntakePut in an address
- Tests50 checks on a phone
- ReadingRules 70 + AI specialist 30
- PrescriptionWhat to fix, in order, and how
Your checkups Kept on this device only · Fix things and re-check, and we'll make a card of the higher score
What this site does well, as AI sees it
Picking out the good points…
1 in 200 Million is a free tool. Put in a site's address and it opens the site on a phone, then shows what could block the link before it spreads, and what the site does well.
Site checked
0pts
Does this diagnosis seem right for this site?
A word from the AI specialist
The AI specialist is writing up the findings…
Prescription
Listed from the fixes that add the most. You can hand it as is to an AI coding tool (Claude Code, Cursor, ChatGPT).
Specialist CareCopy for an AI coding tool · Download .md · hands it all over at once, with code for the tool this site was built with
The prescription is free. Once you've fixed everything, re-check and we'll make a card of the higher score.
Read along The 'Experience' notes come from the month 1 in 8 Billion really spread. That story is in the book Eight Lines (free); how it was made, with the numbers, is in The Workshop.
Vibe coding check · What AI-made sites often miss
This is separate from the score. For secret keys we only say which service they belong to; the key itself is never kept anywhere.
Coming soon · Specialist Care (10 parts, including viral readiness, tailored code, previews by app, share cards, a launch prescription and a privacy policy draft)
What we went through in a month of spreading 1 in 8 Billion, fitted to this site.
Before it spreads
- Viral readiness examWhat this page really sends per visit × 1K, 10K and 100K people a day, set against free plan limits: where it gets stuck first, how to cut it down, and a test to check
- Tailored prescriptionFor every item that lost points, steps and code to paste, fitted to the tool this site was built with (Next.js, Flutter and others). Plus a copy and a .md that hand the whole prescription, code included, to an AI coding tool at once
- Previews by app · In-app browsersHow the link really looks pasted into KakaoTalk, Threads and X (down to where it gets cut off), and where sharing, saving and Google sign-in get blocked when it opens inside KakaoTalk or Instagram
- Deep scanPreview titles, images and descriptions of 20 inner pages in one table, including repeated images and anything missing
- Privacy policy draft · Copy in other languagesA privacy policy draft written from the outside services this page really loads, preview text in English and Japanese, llms.txt and structured data
As it spreads
- Preview image treatmentThree 1200×630 images made from this site's words and colors, ready to download
- Share card treatmentTwo portrait 1080×1350 cards made from this site's results, and code that adds the share sheet, X, Threads and copy link in one go
- Launch prescription · First weekA first post and first reply ready to go, a post for 24 hours later, a 'build it with us' post, one line in English for X, three places where your audience gathers, and an order for the week
After it spreads
- After-spread prepCopycats, trademarks, cost alerts, handling feedback, press, taking payments and refunds: what we ran into after it spread, turned into things to do ahead of time
- Weekly checkupsIf you want, we check again every week and show you how the score changes
Specialist Care
The free checkup tells you where it hurts. Specialist Care makes the medicine for this site. Paste it into the AI you already use (ChatGPT, Claude, Cursor and so on) and the AI fixes things for you. You don't need to know how to code.
- PayOnce per site; it stays open for a year
- Get your medicineIn about a minute, code, images and text made for this site come in one pack
- Paste it into your AISay "fix it like this" and the AI works through it from step 1
- Re-checkYour higher score comes out as a medicine review card
For this site
Payment is handled by Link, run by Stripe, as the seller. You are not charged again, and within 30 days we refund in full with no questions asked. Terms · Privacy
Peek inside the medicine (example)
# Medicine · my-site.example
## 1. Tags for the <head> (filled in with this site's values)
<meta property="og:title" content="Today's fortune draw">
<meta property="og:image" content="https://my-site.example/og.png">
…
## 2. Fix what lost points
### 2.1 The share button doesn't bring people back (up to +12 pts)
In Next.js, add the code below to the share button in app/result/page.tsx …
## 3. Share button · 4. llms.txt · 5. Privacy policy · 6. CheckThe start of one made for an example site. Yours is written for this site's address, words and the tool it was built with.
The 10 parts of Specialist Care, in plain words
Before it spreads
- Viral readiness examIf people suddenly rush in (1K, 10K, 100K a day), which part of your free plan gives out first, and how to cut it down ahead of time
- Tailored prescriptionFor every thing to fix, steps and code to paste, made for the tool this site was built with (Next.js, Framer and others)
- Previews by app · In-app browsersHow your link really looks when posted on KakaoTalk, Threads and X (including what gets cut off), and what breaks when it opens inside those apps
- Deep scanChecks the previews of 20 inner pages too, not just the front page
- Privacy policy draft · Copy in other languages · AI searchA privacy policy draft, your preview text in other languages, and an introduction AI search like ChatGPT reads (llms.txt)
As it spreads
- Preview image treatmentThree of the big images that show when you send a link (1200×630), drawn with this site's words and colors
- Share card treatmentTwo tall cards that make people want to show off their result, plus the share button code
- Launch prescription · First weekYour first post and first reply, the next-day post, a week's plan and three good places to post
After it spreads
- After-spread prepCopycat sites, surprise bills, a flood of feedback: what happens after a site spreads, as a to-do list ahead of time
- Weekly checkupsIf you want, we check again every week and keep a record of how the score changes
Common questions
- Can I use it without knowing how to code?
- Yes. Just paste the medicine into the AI chat or AI coding tool you use. The prescription also shows, with pictures, where on your site each fix goes.
- I built my site with a tool where I can't edit code, like Framer or Wix.
- We detect the tool you used and write where to put what in that tool's settings.
- How long does one purchase last?
- One site, for a year. When you re-check after fixing, the medicine is made again for the site as it is then. It's not a subscription; you are never charged again.
- Can I open it on another device?
- After paying you get a care code (like ABCD-EF23). Enter it on another device to open it there.
- What if I'm not happy with it?
- Within 30 days of paying, we refund in full with no questions asked. Press 'Request a refund' at the bottom of Specialist Care.
I already have a code
Specialist Care
Get your medicine · Hand it all to your AI
Everything in Specialist Care below, made for this site and packed as one dose. Give it to your AI coding tool (Claude Code, Cursor, ChatGPT) and it fixes things in order, from step 1.
Preparing the medicine for this site…
If you copied it, just paste it into your AI chat. If you downloaded it, put the unzipped folder in your project and say "Apply 1in200m-rx/AI-README.md".
Before it spreads Fix what could get stuck, ahead of time
Viral readiness exam · When people pour in
Tailored prescription
Everything to fix, in order, with how to fix it and code for this tool. Paste it as is into an AI coding tool.
Previews by app · In-app browsers
Deep scan · Inner pages
Privacy policy draft · Copy in other languages · AI search
As it spreads Easy to show, easy to send
Preview image treatment
Tap an image to download it. Upload it to your site, then use its address as og:image.
Share card treatment
Launch prescription · First week
After it spreads Hold up and keep it going
After-spread prep
Weekly checkups
We show the record here in your care, and also use it to make our prescriptions better. Outside, it only appears in grouped statistics where no site can be recognized. Turn it off and we delete the re-check records and your answers.
How were visits after your fixes? We ask only once. It helps us make better prescriptions.
Vitals · Opened on a phone
We opened it in a real browser at phone size (390px) and tapped the share button too. Sharing is only recorded; nothing is actually sent.
Cautions · When people pour in
Free plan limits are the figures each service publishes. The number of people is counted by what one person downloads opening this page for the first time. People who come back download less.
AI specialist's findings · Ideas for spreading
Right now
AI wrote these ideas from the text on this site's first screen. They may be wrong.
How it looks pasted into KakaoTalk or Threads
The real look differs a little from app to app. If you can't see the image here, the person who gets the link probably can't either.
Preview suggested by AI
Test details
What a machine can't see
Opening many, many sites ourselves, these are where things often got stuck. Take a moment to ask yourself.
- Can people tell what it is within 3 seconds of the first screen? People who come from a viral post leave fast, in an in-app browser on their phone. Don't hide the good part behind a search box.
- Does it make a 'my result' that's different for each person? People share 'my result', not a site. One picture with a date and a name on it spreads best.
- Is there a reason to show it to others? A surprising number or comparison, a laugh, something moving, or a record to show off: that's what makes people want to send it.
- Does the preview image make people want to tap? More than a lone logo, a picture with big text that shows at a glance what the site does, or what you get, changes the clicks.
- Can people try it right away, before signing up? Show the result first. Asking people to sign in when they save is not too late.
- Is it useful, with nothing broken? A blank screen, a broken button or a 'coming soon' menu sends people who came from a link straight back.
- Is it new, or something people are talking about now? Put up front the one thing that sets it apart, or where it touches what people are talking about right now.
- Does sharing bring people back to this site? If the share button only sends a YouTube or other outside link, the more it spreads, the more someone else's site gains.
Add to the leaderboard
This site is on the leaderboard. Each time someone checks this address, the score is updated.
To take it down, remove the verification tag from your site, deploy, then press the button below.
Once it's up, other makers try it and leave reactions and one-line feedback. Only the site's owner can add it. Put the line below inside the <head> of your site's front page, deploy, then press 'Verify and add'. Remove the tag and it comes down any time.
Tell people about this site
No score here: we put what this site does well into a 'diagnosis certificate'. The diagnosis is a compliment and the findings are the praise it got, so it's easy to post.
Writing the diagnosis certificate…
Medicine review · Your score went up
We only make a card with the score when it went up after fixes. It's compared with your last checkup on this device.
Send the score to a teammate or friend
When you send it to one person, a link that shows the score and what to fix is handy.
Leave a review. If a diagnosis or fix looks off, or there's a test you'd like us to add, just leave a line. We read each one ourselves and use them to improve the checkup rules.
Leave a review or feedback The address and score are already filled inWhy 1 in 200 Million
About 217 million websites are actually running today (Netcraft Web Server Survey, July 2026, active sites). The name means helping yours be the one among them that spreads from person to person. The score's 'top N%' is set against the sites checked here and solo-made sites that spread widely.
What we check
- Link previews 20 The og:image (whether it opens, size, ratio, file size, absolute URL), title and description (length, og:url), whether the KakaoTalk, Facebook and X preview bots get in, the large X card
- Sharing 19 Whether tapping the share button leads back to this site, the phone's share sheet, copy link, a result picture, KakaoTalk, X and Threads, whether each inner page has its own preview, missing pages, #hash addresses
- The way in 17 https and the move from http, things loaded over http, www, first-load size, full load time, first response, compression, the phone screen (sideways overflow, zoom), sign-in on the first screen, Google sign-in blocked inside KakaoTalk, errors as soon as it opens
- Search and basics 7 Text in the HTML and the h1, noindex, robots.txt, canonical URL, sitemap, language, structured data, favicon, home screen icon, manifest, email addresses and account numbers hidden in the code (counted only)
- Pre-spread check 7 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 AI judges strictly from the first screen, the preview image and the text (full marks only at the level of solo-made sites that spread widely): whether you can tell what it is in 3 seconds, a 'my result' that differs for each person, a reason to show others, how much the preview image pulls, trying it without signing up, whether it's useful with nothing broken, whether it's new or something to talk about now
We open the site in a real browser at phone size, take a picture of the first screen, measure the first-load size, full load time, errors and sideways overflow, and tap the share button to see what goes out (nothing is sent). We also open a few inner pages to see if their previews differ.
Small checks in each item add up to an 'item score' out of 100. We place that score among all the sites checked so far to give a bell-curve score and a top N%. The middle is 60. It starts from an expected spread and moves to the real one as sites pile up. For the expected spread, we check about ten small solo-made sites that spread widely, the same way every week, and set it so their middle lands in the top 5%. So to pass 80, a site needs to be close to those. Each site counts once, by its latest score.
70 points come from rules and are always the same. 30 points come from AI scoring against set criteria, so the same site can vary a little. Text hidden on a page to fool the AI is left out, and such a site gets only half of the 'what people will like' points.