Free · no account · works offline
The smart clock for your browser:
alarm, timer, stopwatch & world clock
Fifteen precision time tools with photo scenes that follow the time of day. Everything runs on your device: no ads, no signup, no downloads.
Every clock and timer, one tab
Each tool has its own page, its own keyboard shortcuts, and digits you can read from across the room.
Alarm clock
Multiple alarms with labels and snooze. Rings from the tab — nothing to install.
OpenCountdown timer
Presets from 1–60 minutes and custom up to 12 hours. Drift-proof in background tabs.
OpenStopwatch
Centisecond precision with laps, measured from timestamps so it never lies.
OpenWorld clock
Every time zone, automatic DST — and each city's card shows day or night at a glance.
OpenPomodoro
25/5 focus blocks with auto-advancing breaks and a daily session count.
OpenChess clock
Bullet to classical with Fischer increment. One screen between two players.
OpenInterval timer
HIIT, EMOM and boxing rounds — color-coded work/rest with chimes.
OpenTabata timer
The 20/10 × 8 protocol preloaded. Four minutes, honestly counted.
OpenEgg timer
Soft, jammy, or hard — presets with a chime that carries to the next room.
OpenMeditation timer
Opening and closing bells, optional interval bells, zero tracking.
OpenMilitary time
Live 24-hour clock with the full conversion chart.
OpenDigital clock
Full-screen digits readable across a classroom. Press F.
OpenNight clock
A dim, full-screen bedside clock that keeps the screen awake.
OpenMetronome
30-260 BPM on the audio clock — tap tempo, accented downbeats.
OpenSleep calculator
Bedtimes aligned to 90-minute cycles for your wake-up time.
OpenThe smart part
A clock that knows what time it looks like
The default Smart scene resolves to real photography matching the time of day — dawn light at dawn, stars at midnight — and shifts automatically as the day moves. On the world clock, the same idea shows you at a glance which cities are awake: daytime cards go light, nighttime cards go dark.
Built for the ways people actually use an online clock
Timers that can't drift
Every countdown is anchored to your system clock instead of counting ticks, so a throttled background tab can't make an alarm late. The tab title carries the live time or your running countdown, so you can watch it from any tab.
No permission prompts
The chime is synthesized in the page at the moment you set an alarm — no notification permission, no audio files, no autoplay battles. Wake lock keeps the screen on when a tool needs it.
Private by architecture
Alarms, cities, and preferences persist in your browser's local storage and never leave your device. There is no account to create and nothing to unsubscribe from.
Frequently asked questions
- Is SmartClock really free?
- Yes. Every tool — alarm, timer, stopwatch, world clock, pomodoro, chess clock, interval timers and the rest — is free with no account and no ads. Pro ($3/mo or $49 once) adds the AI assistant, the AI call-time finder, the full scene collection with the complete Smart day cycle, unlimited world clocks, and pomodoro history.
- What makes it a smart clock?
- The default Smart scene resolves to the time of day: dawn photography at dawn, bright sky at midday, stars at night — and on the world clock, each city's card shows whether it's currently day or night there. The tab title also carries the live time or your running countdown, so the clock works even from another tab.
- Will alarms and timers work in a background tab?
- Yes. Deadlines are anchored to your system clock rather than counted in ticks, so browser throttling can't delay them — the chime fires on schedule. Keep the browser open; a closed browser can't ring.
- Do I need to allow notifications or install anything?
- No. The chime is synthesized inside the page when you set an alarm or start a timer, so there is no notification permission prompt, no audio file to load, and nothing to install.
- Does SmartClock work offline?
- Once a page is loaded, yes — every tool runs entirely in your browser against your device's clock. No server is involved in keeping time.
- Is my data collected?
- Alarms, world-clock cities, theme choice and preferences live in your browser's local storage and never leave your device. There is no account and no tracking of your usage.
SmartClock Pro
Tell it what you need. It works out the rest.
Five things you can ask for in plain language, instead of setting them by hand.
- “Timer for pasta” and it works out the duration and sets it.
- “Is Monday a working day in all three?” answered for every city on your board.
- “20 minutes, no jumping” becomes a structure, loaded into the timer.
- “Up at 5am, I sleep at midnight” gets you a plan to move it without wrecking the week.
- “Letting go of a bad day” returns mantras paced to your breathing.