ClockAura — free online timer, stopwatch & countdown

Q: Does ClockAura work offline?

Yes. After the first visit the page is cached so the timers, stopwatch, Pomodoro and ambient sounds work without an internet connection.

Q: What is the most accurate online stopwatch?

ClockAura's online stopwatch is accurate to within a few milliseconds on modern desktops, using the browser's performance.now() API. Lap times are stored locally and can be exported after the run.

Q: Can I share a timer link with someone else?

Yes. Every preset timer has a unique URL — for example /pomodoro-timer, and any length can be typed into the address bar, such as /t/5m or /t/until/17:00. You can also create an Event Countdown that generates a shareable link to any future date.

Q: Is ClockAura suitable for classrooms or group activities?

Yes. The Classroom Mode shows enormous projector-friendly digits readable from across a room. Teachers use it for timed activities, transitions and exam practice. The Random Picker is also useful for choosing students fairly.

05:00

Start 5 min Custom time Stopwatch

Quick start: 1 min 10 min 15 min 25 min 30 min 1 hour

ClockAura is a premium, free online productivity platform with timers, stopwatches, pomodoros, countdowns, world clocks, ambient focus sounds and shareable event countdowns. No sign-up. No downloads. Works on any device, in any browser, even offline.

Free timer tools

Free Timers for Teachers — classroom, visual, exam timers + name picker, all in one place
Online Stopwatch — count up with lap times and full-screen mode
Countdown Timer — set hours, minutes, seconds; loud alarm when done
Pomodoro Timer — 25-minute focus + 5-minute break, auto-cycles
Alarm Clock — set an alarm for a specific time
Egg Timer — quick presets for soft, medium, hard boiled
Interval Timer — HIIT, Tabata, EMOM workout cycles
World Clock — live time across cities and countries
Countdown to Date — days, hours, minutes to any future date
Holiday Countdowns — how many days and sleeps until Christmas, Easter, Diwali, Halloween and more
Random Picker — spin a wheel of names
Chess Clock — two-player blitz and rapid timer with increment
Online Metronome — precise BPM click track for practice
Online Clock — full screen digital clock for your desk
ClockAura start page — a calm clock with one-tap timers to set as your browser's home page
Analog Clock — live clock face, great for learning to tell time
Sauna Timer — time each sauna round
Cooking Timers and Gym Timers — one-tap preset collections
Ambient Focus Sounds — rain, cafe, forest, white/brown noise
Multi-Timezone Meeting Planner — find a time that works across zones
Event Countdown — shareable countdown link for any event
Smart Preset Collections — study, gym, cooking, meditation, kids
Classroom Timer Mode — huge projector-friendly display
Exam Timer Mode — distraction-free full-screen exam clock
Presentation Timer Mode — on-screen timer for talks and demos
Meeting Timer Mode — keep meetings running on schedule
Embed a Timer — get an iframe for your blog or site

Tools for workouts, music, games and work

Plank Timer — a full screen hold timer with targets by level and a 30-day plan
EMOM Timer — beeps at the top of every minute, with sample EMOM workouts
Tabata Timer — 20 seconds on, 10 seconds off, 8 rounds
Metronome — 30 to 250 BPM in 2/4, 3/4, 4/4, 5/4, 6/8, 7/8 and 12/8
Chess Clock — blitz and rapid time controls with Fischer increment
Decimal Hours Converter — hours and minutes to decimal for payroll
Military Time Converter — 1700 to 5 PM and back, with a full chart
Elapsed Time Calculator and Add or Subtract Time — durations without the mental maths
Age in Seconds — how many seconds old you are, live

Popular time guides

Quick preset timers

Need a different duration? Use the Countdown Timer and set any combination of hours, minutes and seconds.

Read the blog

Free timers for teachers and classrooms

ClockAura is built to be projected in class. The Classroom Timer fills the screen with digits readable from the back row — no ads over the timer, no sign-up — for tests, group work, brain breaks and transitions. The Visual Timer shows time as a shrinking coloured disc with a no-numbers mode for young children and autism/ADHD learners, the Exam Timer gives a distraction-free countdown for mocks and timed practice, and the Random Name Picker cold-calls fairly from your class list.

See everything built for the classroom on the free timers for teachers page, including a printable transition cheat sheet. It all works on Chromebooks, iPads and laptops, keeps the projector awake mid-countdown, and keeps running if the Wi-Fi drops once loaded.

Why ClockAura

ClockAura was built for students, athletes, teachers, developers, cooks and creators. A timer keeps running if the connection drops once the page has loaded. No sign-up. No downloads. Just open a tab and press start. The interface is designed to be premium-grade — every animation, transition and number is obsessed over.

Whether you're running a Pomodoro session at your desk, leading a classroom activity, planning a remote team meeting, or counting down to a birthday or exam, ClockAura has the right tool — beautifully designed and free forever.

Built and maintained by Om Vaghani · Content last reviewed July 2026.

The science behind timed work

Short, planned breaks help people stay on task: in a 2011 study in Cognition, participants who briefly switched to something else twice during a 50-minute task kept their performance steady, while those who worked straight through slowly got worse. The Pomodoro Technique turns this into a routine: twenty-five minutes of focused work, five minutes off, repeat. For your body, the Mayo Clinic suggests you take a break from sitting every 30 minutes; a 5-minute timer is an easy way to remember.

ClockAura ships purpose-built tools for each of these patterns: the auto-cycling Pomodoro tool handles work and rest cycles, the HIIT and Tabata cycle timer manages workout intervals, and the browser-generated noise mixer creates brown, pink and white noise to mask environmental distractions.

How ClockAura works

Open the tool you need — a lap timer, a countdown, a focus session manager or a live time-zone view.
Press Start. Every tool runs entirely in your browser using standard web APIs.
Use the keyboard shortcuts — Space to start or pause, R to reset, F for full screen, L to lap.
Switch tabs freely. The countdown keeps running and the remaining time stays in the browser tab title.
When time is up, the alarm plays even if the tab is minimised.

Every tool is mobile-friendly. The display scales from a phone screen to a projector. Classroom Mode in particular is designed for huge wall projectors so a whole room of students can read the timer from anywhere.

Who uses ClockAura

Students — Pomodoro sessions for revision, 45-minute deep-work blocks for problem sets, exam practice with exam mode.
Teachers — projector-sized classroom timers, the name wheel picker for fair student selection, interval timers for station rotations.
Athletes and coaches — Tabata, EMOM and HIIT cycles via the workout cycle timer, with loud audio cues so you never have to glance at the screen mid-set.
Developers and creators — long deep-work blocks (1-hour, 90-minute) paired with brown noise or rain to mask office or street audio.
Cooks — quick presets for soft, medium and hard boiled eggs, pasta and tea steeping.
Remote teams — the global time zone dashboard shows live time across 70+ cities and the Meeting Planner finds the slot where everyone is in work hours.
Parents — a visible 15-minute visual timer for clean-up, screen time and tooth brushing turns negotiations into clear rules.

Frequently asked questions

Is ClockAura free?

Yes. Every tool on ClockAura is free. No sign-up, no credit card, no premium tier. The site is supported by lightweight ads and we will keep the core timers free forever.

Do I need to sign up or install anything?

No. ClockAura runs entirely in your browser. Open the URL and use any tool immediately. There is no account, no download, no app to install.

Does the timer keep running if I switch tabs?

Yes. The countdown keeps running and the remaining time is shown in the browser tab title. An alarm plays when the time is up, even if the tab is in the background.

Does ClockAura work offline?

Yes. After the first visit the page is cached so the Pomodoro, stopwatch and ambient sounds work without an internet connection.

What is the Pomodoro Technique?

The Pomodoro Technique is a time-management method created by Francesco Cirillo in the late 1980s. You work for 25 minutes, take a 5-minute break, and repeat. After four rounds you take a longer 15 to 30 minute break. ClockAura's 25/5 focus app auto-cycles the work and break intervals so you do not have to think about resetting it. See how to choose a Pomodoro timer for settings that suit different kinds of work.

What is the most accurate online stopwatch?

ClockAura's millisecond-accurate stopwatch works on modern desktops using the browser's high-resolution timer API. Lap times are stored locally so you can review or export them after the run.

Can I share a timer link with someone else?

Yes. Every preset timer has a unique URL — for example clockaura.com/t/5m starts a 5 minute timer straight from the address bar, or the Pomodoro focus link. You can also create a shareable event countdown that generates a unique link to any future date.

Is ClockAura suitable for classrooms?

Yes. Big-display classroom mode shows enormous projector-friendly digits readable from across a room. Teachers use it for timed activities, transitions and exam practice. The fair student selector wheel is also useful for choosing students fairly.

Share ClockAura

If ClockAura helps you focus, please share it with friends, classmates or your team — it keeps the tools free for everyone.