A web clock that hasn't been updated in three years has held the #1 spot for the US "clock" search

Searching "clock" on Google in the US gets 1M searches a month, and the #1 result is clocktab.com, a large-display clock page a French developer built 2011 years ago. Over the last three months its global traffic rank climbed from 360k to 76k, which looks like growth, but most of it is US schools reopening: teachers put it back on classroom screens. What's worth examining is how one domain and one clock took over a decade of search traffic, and whether that can be repeated today.

A letter from March 2023 years ago

On March 2023 10, Romuald Brillout wrote on clocktab.com's donation page: "For a long time I refused to put ads on Clock Tab, I don't like ads. But I want to improve it, and I have a lot of ideas for new features." Any amount is fine: "If money is tight, $0.01 via PayPal is totally fine," and after paying you automatically receive a hidden code that removes ads.

The next day, March 11, he made the last commit to Clock Tab's open-source repo, changing the background image to download from imgur. For the three and a half years since, that repo hasn't changed a single line.

Romuald is better known in developer circles as the author of Vike (formerly vite-plugin-ssr). Clock Tab and its sister site Timer Tab were a side project of his from about fifteen years ago. The domain was registered in Dec 2011 26, and PCWorld covered Timer Tab that same year. By November 2026, this unmaintained side project was getting roughly 1.5M visits a month (SEMrush, 7–September 1.35M / 1.54M / 1.48M).

It's just a clock

Open clocktab.com and the whole screen is one large digital clock. You can choose 12 or 24-hour format, show or hide seconds, the date, and the week number. The background image, colors, and fonts are all customizable, and a styled setup can be shared as a link. The key detail is that the browser tab title also ticks the time live. The author calls this "Time Icon," which makes it well suited to staying open as a tab all day. The same site also has a countdown and a full-screen message board, and the sister site timer-tab.com handles timers, alarms, and stopwatches.

No app, no account, no subscription. The money comes from the display ads on the page, plus the PayPal donation to remove them mentioned above. Revenue has never been disclosed.

Why it looks like it's rising now: school reopening, not new traffic

On the global traffic ranking (Tranco), clocktab.com was at 13k in Aug 359, its low point. By Nov 6 it had reached 76k. But over the same period its monthly visits only grew about 10% (SEMrush, July to September).

Put it next to the tools teachers use in the classroom and it makes sense. In Chrome's real-user data, clocktab.com ranks in the top 10k in the US in May, falls to the top 50k from 6 through August, then climbs back to the top 10k in September: a textbook summer drop and back-to-school bounce. classroomscreen.com, a whole-screen tool for teachers, climbs from 110k to 36k over the same stretch, roughly the same 3.1x gain. vclock.com and online-stopwatch.com follow the same shape. time.is and timeanddate.com, which have nothing to do with schools, stay basically flat over the same period.

Rankings amplified the change more than visits did. The likely reason is that its users leave one computer on all day: average session of 41 min 25 sec, 75% desktop, 65% US (SEMrush). When more devices switch on in school and office networks, the ranking jumps noticeably.

Whether it has really grown compared with the same period last year can't be determined, since ranking data only goes back to late July. The global line is one tier better in September than in May, so there may be some real growth, but the size can't be confirmed.

Where users come from: one keyword, plus fifteen years

Holding #1 for "clock" comes from a few things followers can't buy: an exact-match old domain (registered 2011 years ago); 12.8k backlinks built over a decade, mostly from teacher resource pages, productivity blogs, and forum mentions; and user behavior. People who land on it get a clock, exactly what someone searching "clock" wants. They stay 41 minutes and half come back directly, and those signals keep the ranking stable.

The term "clock tab" itself gets 135k searches a month, a sign that many people now treat it as a brand and search for the name directly.

No evidence was found of paid ads, TikTok, Product Hunt, or Hacker News promotion, and no one on X has mentioned it in the last three months. The author himself doesn't promote it.

Who's competing

The more direct threat is same-name copycats. clocktab.app is tied to a Chrome extension also called Clock Tab, with 4,000 users and a 4.79 rating, marketed as "no ads, works offline." Its store listing says "press F for full screen, use it as a desktop clock on a second monitor for meetings and presentations," and it even has a dedicated classroom-clock page. myclocktab.com was registered in October 2025, targets students and teachers, and is doing SEO through blog posts. They capture the brand term "clock tab." The original site hasn't been updated in three years, and these newer sites have matched or surpassed it on features.

What to learn from it

First, the format itself. A single function, usable the moment it opens, and designed to stay open (moving information in the tab title). Time on site and return visits will be high, which suits display ads especially well. Timers, pomodoro clocks, countdowns, exchange rates, air quality, and sports scores can all use this same shell.

Second, rule out seasonality before calling growth on a site. Classroom and office tools drop every year from 6 to August and recover in September. Compare against a site like classroomscreen and you won't mistake school reopening for a breakout.

Third, when an old site goes unmaintained, its brand term gets captured by same-name extensions and new sites. That's the only opening followers have today.

If it were you

C: Worth learning from, but building a generic online clock isn't worth it. Its traffic comes from a 2011-year-old exact-match domain and a decade of #1 for "clock," and neither can be bought today. The long-tail terms are already crowded with a dozen new tool sites, and same-name extensions already exist.

Who it's for: Independent developers who already run tool sites and know SEO, who want an always-open single-purpose page for their network, or who want a small classroom-focused tool.

Who it's not for: Anyone hoping to take "clock" or "online clock" head terms with a new domain, or anyone expecting meaningful short-term income from it (ad revenue isn't disclosed, and from outside you can't tell what a clock earns).

How to build it: Don't build a generic clock. Pick a specific setting and make a page people leave open: for classrooms (large-face clock + timetable countdown + bell reminders), for exams (full-screen exam timer), or a "clock / timer" term in a non-English market not yet held by an old site. Also build a Chrome extension, since the new-tab page is a natural always-open spot, and it's how clocktab.app got 4,000 users.

How to get users: SEO with scene pages (terms like classroom clock and exam timer), plus resource pages and forums for teachers, and places teachers browse such as Pinterest. Backlinks should come the way Clock Tab's did, from people casually recommending it.

When to start: No rush. The next US school low point is from 6 to August next year. Get the page built and indexed before then, to catch the late-August 2027 school-reopening wave.

Signs you've got it wrong: If clocktab.com doesn't dip from 6 to August next year and instead keeps rising, that means it's more than seasonal and real structural growth is happening, which deserves a fresh look. Conversely, if a same-name site like clocktab.app takes the #1 spot for the "clock tab" brand term within a year or two, the old site's rankings are less stable than they appear, and the opening for followers is bigger than estimated now.