Google’s Buried Page Reveals 500 Niche Websites Still Making Cash

Google has buried a page on its own ad properties site that lists more than 500 niche publishers quietly making real money, and almost no one outside the SEO underground knows it exists. It takes a single search operator to find. The reward is a master list of cash-flowing website ideas the AI search panic has barely touched. Calculator sites. Recipe blogs. Solitaire games. Letter templates. Each one a working business someone built and Google’s own writers profiled.

Type site:google.com/ads/publisher/stories/ into the search bar. The results are vetted case studies Google itself commissioned about publishers it pays through AdSense and Ad Manager. The most lucrative example is run by a Houston engineer named Huiming Gu, whose calculation and unit-conversion sites pull tens of millions of monthly visits and an estimated quarter-million dollars a year from one tool alone.

A Buried Google URL Worth More Than Most SEO Courses

Most digital marketers learn niche-site theory from courses that cost four figures. Google has been publishing the answers for free on its own publisher relations page since at least the late 2010s, and the page does not surface in normal searches because almost nothing links to it.

Run the search operator and you get a directory of roughly 500 independent publishers across recipes, games, travel, finance, calculators, dictionaries, classified listings, weather alerts, and dozens of other verticals. Each profile names the founder, the founding year, the team size, the audience scale, and the monetization path that turned the project into a business.

The collection functions as a reverse-engineered map of which niches Google’s own ad team considers durable. The categories show up over and over because they survive every algorithm shift, including the current one. A short selection of what comes back from a single search of Google’s full publisher success stories index:

• Calculation and conversion tools, including Maple Tech International, the operator behind Calculator.net and UnitConverters.net.
• Recipe and food blogs such as Natasha’s Kitchen, The Woks of Life, and Once Upon a Chef.
• Casual browser games like Jigsaw Explorer, Sporcle, and CrazyGames.
• Reference and education sites including Dictionary.com, Geology.com, Ptable, and Time and Date.
• Personal finance and money-saving sites like Be Clever with Your Cash, Skint Dad, and Mobills.
• Specialty review sites such as Temptalia for makeup, BMWBLOG for German cars, and Try Hard Guides for video games.

The Houston Engineer Behind Tens Of Millions Of Monthly Searches

Huiming Gu started Maple Tech International in 2008 as a side project from his engineering job near Houston. He had spare evenings, no specific idea, and a habit of checking Google Trends and the Keyword Planner to see what real people were searching for. The data kept pointing to one thing: calculations and unit conversions, with massive search demand and almost no decent free websites serving it.

“I could barely find any well-built calculation and conversion websites, so I did,” Gu told Google’s writers in the Maple Tech International publisher case study. “That’s how Maple Tech International started.”

He built three flagship sites: Calculator.net for math and finance, UnitConverters.net for measurements, and USBankLocations.com for branch directories pulled from federal data. All three were free, fast, and stripped down. None of them tried to sell anything.

Once traffic reached a meaningful level, Gu cycled through several ad networks before moving to Google AdSense and later Google Ad Manager. The shift produced 20% to 30% revenue growth every year. Within a few years, the ad income exceeded his engineering salary, and he left to run the sites full time.

The current numbers are not small. Semrush’s traffic overview for Calculator.net recorded 51.6 million visits in March 2026, with the site ranked first in the Math category for United States users. UnitConverters.net pulled 6.82 million visits in January 2026, and 78.43% of its desktop traffic still arrives through Google organic search. Independent estimates put UnitConverters alone at roughly $250,000 a year in ad revenue, which means the parent company is meaningfully larger than that.

Tool Sites Are The Niche AI Overviews Cannot Eat

The dominant story in SEO right now is decline. Ahrefs’ research note on AI Overviews and click loss measured a 34.5% drop in clicks on the top organic result when an AI Overview appeared above it. Other field studies have put the cut as deep as 58% on informational queries, with some publishers reporting 89% click drops on individual high-volume pages. Calculator and converter sites have largely escaped that wave because the search result is the call to action. A user who Googles “convert square meters to acres” wants the box to type into. An AI summary cannot run the calculation while preserving precision across thousands of unit pairs.

That structural advantage shows up in the numbers when you compare a tool site to an informational blog covering the same topic.

• 51.6M monthly visits to Calculator.net in March 2026, with the site holding the top spot in its US category.
• 78.43% organic share of desktop traffic to UnitConverters.net, meaning the AI search shift would have crushed the site if it were an informational page.
• 34.5% click reduction on the top organic position when AI Overviews appear, per Ahrefs’ field study.
• ~$250,000 annual ad revenue attributed to UnitConverters alone in independent valuation reports.

The Same Pattern Behind Every Story That Cashes Real Checks

Three founders, three founding decades, one pattern. Build a free utility that does one job better than anyone bothered to before. Wait until traffic is real. Add ads. Never paywall.

Robert John Stevens followed that path with WriteExpress, a letter-template tool he and BYU linguistics professor Melvin J. Luthy launched in 1995. The original business model was paid software supported by an AdWords budget. According to the WriteExpress publisher case study on Google, an employee suggested they switch the templates to free and run AdSense against the visitors who were leaving without buying. Within weeks the company was making thousands per week in ad revenue. Lifetime AdSense earnings have since crossed $1 million.

Bob Flora ran a similar play with Jigsaw Explorer. He started the company in 2001 as a downloadable PC puzzle program, pivoted to a browser version in 2009, and partnered with Google Certified publishing partner AdThrive once traffic justified it. “Ads have been great for my business,” Flora said in the Jigsaw Explorer case study published by Google. The site grew revenue 170% from 2018 to 2020 and saw a 60% traffic spike in the early pandemic. It now claims about 660,000 active players.

Maple Tech, WriteExpress, and Jigsaw Explorer started in different decades and different niches. The shared structure is what matters.

What The Niche Site Forums Will Not Quote In Public

Threads in r/juststart and r/SEO are full of operators announcing AI Overviews killed their thin-content blogs. The complaints match the published data: zero-click search rates have moved past 60%, AI Overviews now pull from Reddit on roughly 21% of citations, and the era of writing 800-word affiliate posts to rank for buyer intent keywords looks ended for most niches. A different group of publishers stays quiet because their tool sites are still printing. Neil Patel, the SEO consultant whose firm tracks ranking shifts for major brands, summarized the moment in a September X post on AI search and visibility.

AI search is no longer the future, it’s already here. In 2026, ChatGPT, Perplexity, and Google are transforming search into an ad-driven ecosystem where visibility and revenue collide inside the answers people trust.

Patel’s framing helps explain why utility sites win where blogs lose. An AI agent can summarize a recipe blog and strip the page of its ad inventory along the way. It cannot render an interactive jigsaw puzzle inside an answer box, run a 30-year amortization schedule with a user’s exact numbers, or convert square meters to bigha for an Indian land buyer who needs the answer to be exact. The destination is the product, and the ads ride alongside.

How To Actually Mine The Page For An Idea You Can Build

Running the search operator is step one and the easiest part. The harder work begins after, because the obvious moves (clone Calculator.net, copy Jigsaw Explorer) are exactly the moves that fail. The opportunity sits in the tools the published companies have not built yet.

A working process for turning the page into a buildable shortlist:

1. Run the operator and bookmark the index page; the categories filter on the page itself.
2. Pick a vertical where you have personal experience or domain knowledge already, because the build will take 12 to 24 months before traffic is meaningful.
3. Read the case study to identify the specific job the published company does, then list adjacent jobs they do not do.
4. Open Google Trends and Keyword Planner to confirm the adjacent demand still exists at meaningful volume.
5. Look at the AI Overview behavior on those queries. If Google answers in text, the keyword is dead. If it suggests a tool, the keyword is alive.
6. Build a single best-in-class free tool for that job before writing any blog content around it.

The reward is not a clone of Calculator.net. The reward is the calculator Calculator.net never bothered to build. A property tax estimator for a single state. A nutrition converter for a single cuisine. A unit translator for a single trade. The Publisher Stories page is full of operators who built that kind of narrow tool, ranked it, and never bothered to expand sideways.

Frequently Asked Questions

What Does The Search Operator Actually Return?

The operator restricts Google’s index to one subdirectory on Google’s main ad properties site, which contains roughly 500 individual case studies of publishers in the AdSense and Ad Manager programs. Each case study includes the publisher’s name, founder, niche, and the specific advertising path they used to monetize. The page is public but barely linked, so it almost never surfaces in normal searches.

Are Utility Tool Sites Like Calculator.net Still Profitable In 2026?

Calculator.net is currently the top-ranked Math category site in the United States according to Semrush, with 51.6 million monthly visits as of March 2026 and growing roughly 8% month over month. Its sister site UnitConverters.net pulls more than 6 million monthly visits with 78% organic search dependency, and independent valuation reports estimate revenue near $250,000 per year for that one property.

Do AI Overviews Kill Traffic To Free Tool Websites?

No, not in the same way they hurt informational blogs. Ahrefs measured a 34.5% click drop on top organic positions when AI Overviews appear, but that effect concentrates on queries the AI can answer in text. Calculations, conversions, and interactive widgets cannot be replaced by a summary box, so the tool sites remain the destination instead of being collapsed into the result.

How Long Does It Take To Earn Real AdSense Revenue From A New Tool Site?

Approval into Google AdSense typically takes a few weeks of meaningful traffic and original content. Real revenue takes much longer. Maple Tech’s founder built his sites in 2008 and only switched to full-time operations after several years of compounding 20% to 30% annual ad-revenue growth, and Jigsaw Explorer ran without significant ad income from 2001 until its 2018 partnership with AdThrive.

Which Categories On The Publisher Stories Page Have The Most Cash-Flowing Examples?

Recipes are the largest single category by case study count, followed by browser games, education and reference tools, travel content, and personal finance. The highest publicly disclosed lifetime numbers come from utility tool publishers, including WriteExpress with more than $1 million in lifetime AdSense earnings, and Maple Tech International with multiple sites in the eight-figure annual visit range.

Is Starting A Niche Tool Site In 2026 Still Worth The Time?

It can be, but only with a tool that solves a specific job AI cannot complete inside a chat answer. The economics that worked for Calculator.net, Jigsaw Explorer, and WriteExpress still work for narrow utilities in finance, real estate, education, recipes, and trades, where users need precise interactive output. Generic informational blogs targeting broad keywords are a much harder bet now.

The Publisher Stories page is not a secret to Google. It is a marketing asset Google built so prospective publishers would believe AdSense still works at scale. The accidental side effect is a public list of every kind of website Google’s own ad team has decided to celebrate.

Most of those publishers started in spare evenings, on a hunch, with one specific tool nobody else had bothered to build well. The 2026 version of that move is still available. The hard part is finding the calculator nobody else has built yet.