What untl is
untl is a small collection of time-handling tools focused on doing one thing well: showing you a useful, accurate number as fast as possible. The headline product is a set of live countdowns to every weekday, to midnight, to tomorrow, and to the most-searched holidays. Around it sits a small suite of related utilities: a stopwatch, an online timer, an age calculator, a 24-hour to 12-hour converter, and a birthday countdown.
Every page on the site is static, served from Cloudflare's edge, and ships with the live countdown number already rendered into the HTML. You don't wait for a script to boot before you see the answer. The tools that need interactivity load a small piece of JavaScript only on the page that needs it. Nothing autoplays and the layout doesn't shift around as the page loads.
How the countdowns work
Each countdown page targets a specific moment: the strictly-next Friday, the next midnight, December 25 of the current year, and so on. The arithmetic runs in your browser using the local Date object, so the answer is correct for your timezone without any server-side timezone guessing. The seconds card ticks once per second using a shared interval and the Web Animations API for the digit flip, which means there's no persistent CSS animation that could blank out the number under a print or screenshot snapshot.
For the seven weekday pages, the picker below the clock lets you set the target time on that weekday. Friday at 4 PM is the default for the Friday page because it's the most-searched specific weekday-and-time pair on the internet. The other pages default to a sensible local time and let you change it.
The full tool set
The countdown hub lists every named countdown, organised by weekday and by holiday. The how-long-until tool accepts any date and time and produces a live countdown with a shareable URL. The stopwatch counts up with lap times; the online timer counts down from a set duration and beeps at zero. The age calculator takes a date of birth and produces your exact age in years, months, weeks, days, hours, minutes and seconds, plus the weekday of your next birthday. The 24-hour to 12-hour converter handles the format math between military and AM/PM time. The birthday countdown reuses the main flip-clock to count down to your next birthday.
Bookmark anything; everything is a URL
Every tool on the site is a single URL with state encoded into the path or the query string. Bookmark the page with your settings in place and you have a persistent shortcut. The home page has a search bar that posts to the how-long-until tool with your target encoded; the countdown pages take their target weekday from the URL; the how-long-until tool persists the target date in the URL as you type.
Nothing on the site requires an account or saves state on a server. That keeps the surface area small and the site fast, but it also means there's nothing to migrate, sync, or lose. The bookmark is the data.
Why a separate page per intent
The site is built on the principle of one page per intent cluster, not one page per phrasing. The Friday page is the canonical destination for the whole family of queries: how many days until Friday, how many hours until Friday, how long till Friday, Friday countdown, Friday at 4 PM, how many seconds until next Friday. All of them land on the same URL, get the same authoritative answer, and contribute to the same page's rankings.
That keeps the site tight, fast, and consistent. There are fewer than 30 indexed pages in total, each one earning its keep with a real answer to a real question.
Built for speed and accessibility
Pages aim for a Lighthouse score of 95 or better across performance, accessibility, SEO and best-practices on mobile. The hero number is in the SSR HTML, so there's no layout shift when the JavaScript loads. The site respects prefers-color-scheme on first paint and persists your choice when you use the theme toggle. Every interactive control is keyboard-reachable with visible focus states; the segmented controls are aria-pressed button groups, the picker is a real form, and the breadcrumb trail at the top of every non-home page gives screen-reader users a clear hierarchy.
About the brand
untl is an online brand of time tools at untl.io. The headline product is the set of live countdown clocks, with a supporting suite of stopwatch, timer, age calculator, birthday countdown, and time-format converter. The full brand background is on the about page, including the brand's social presence on Instagram at @untl.io.
A note on the live number
The live countdown number is the centrepiece of every page. It is rendered into the HTML at build time, so the first paint shows a real value, not a placeholder. The seconds card flips once per second using the Web Animations API, with only the digits that actually changed being re-animated. Everything around the number is restrained on purpose so the number stays the first thing your eye lands on.
Below the clock, a short plain-language line ("Friday is in 2 days, 4 hours") gives the same answer in words, and a small uppercase timezone label confirms which timezone the calculation is using.
Frequently asked questions
- Is untl free?
- Yes. Every tool on the site is free to use. There are no accounts, no paywalls, no premium tier.
- What data does the site collect about me?
- The site itself does not run a first-party database; the only direct storage is a single localStorage entry for your colour-theme preference. Aggregate traffic measurement is handled by Google Analytics and advertising by Google AdSense. Both are described on the privacy page.
- Does the page work offline?
- Once the page has loaded, yes. The live tick uses only your device's clock. Reloading needs an internet connection, since the site is static and served from Cloudflare's edge.
- Which timezone does the countdown use?
- Your local timezone, read from your browser. If you want a countdown in a different timezone, change your browser or OS timezone setting and reload.