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A browser extension that replaces the open-devtools-inspect-copy-clean ritual with a single click, sold as a one-time purchase or $20 a month to developers in 116 countries.
$60,000 of that arriving in a second nine-month stretch · one-time purchase or $20/month · users across 116 countries · solo, no employees
Fewer bars = easier, cheaper, or faster for an AI-assisted solo builder. Editorial judgments based on the case details.
Guilherme Rizzo is a self-taught developer in Brazil. He never went to university; he learned to code from books. The annoyance that became his business was one he hit constantly while building websites: to see how another site styled an element, you open developer tools, click through the element tree, copy the rules, then clean up the mess by hand. Two or three minutes, every time, for something you need dozens of times a week. CSS Scan collapses that into a single click. Hover an element, click, and its styles are on your clipboard, already tidy. The pricing is a one-time purchase or $20 a month. The revenue arrived in two roughly equal-length stretches. The video describes a first milestone reached after nine months, then $60,000 over the following nine months, with cumulative revenue passing $100,000 — the Korean analyst converts that to ₩140 million. The first milestone figure is garbled in the auto-caption and we do not reproduce it. Usage is given as 116 countries; the user count is also garbled mid-sentence, though the analyst's punchline survives intact: a few thousand paying developers is enough, and you do not need a million. What he did with the money is part of why the case travels. He worked from Brazil, Mexico, Europe and Asia while the product ran, carrying one laptop. The source named on screen is Rizzo's own revenue post on Indie Hackers.
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Join the Unicorn Club — $5/moCancel in one click · first payment refundable for 7 daysData credibility: Third-party breakdown rather than a founder interview. A Korean solo-business channel compiled four Chrome extension businesses and names its source for this one on screen: Guilherme Rizzo's own revenue post on Indie Hackers. No dashboard or payment screen appears in the video, so the figures are founder claims relayed by an analyst, unaudited. Two numbers in the source are garbled in the auto-captions and we deliberately omit them: the amount attached to the first nine-month milestone is transcribed as an impossible figure that contradicts the stated cumulative total, and the user count is cut off mid-word in both places it appears — we therefore report only 116 countries and the analyst's surviving point that a few thousand users suffices. The ₩140 million conversion is the video's own. The founder's background (self-taught, no university, working from Brazil, Mexico, Europe and Asia) is the analyst's description. Nothing about infrastructure, costs or margins is stated for this business; that section is explicitly our inference.