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Vol. 01 — Stopwatch & countdown

The CleanStopwatch timer

The minimalist timer for classrooms, streams & study.

Create pixel-perfect classroom timers, study countdowns, and Pomodoros. Customise layouts, toggle Zen mode, and embed instantly into Notion, OBS Studio overlays, Figma, or personal teaching spaces.

Open Timer AppCustomize Widget

Used by developers and students globally. Zero setup, zero signup.

Live specimen25 / 5
Live Embed
03
Timer modes
10
One-tap presets
07
Answers below

Quick Start Preset Timers

10 presetsBrowse all →

Ten one-tap intervals, filed by use. Countdowns for tasks, a stopwatch for laps, Pomodoros for study blocks — pick one and the clock starts.

01 / Countdown

Countdown timers

Fixed intervals for tasks, study blocks, and the kitchen.

02 / Stopwatch

Stopwatch & laps

Count up with millisecond laps and running splits.

Standard StopwatchLap tracking guide

03 / Pomodoro

Pomodoro blocks

Work and break intervals, rung automatically.

Standard Pomodoro (25/5)Double Pomodoro (50/10)

Embed Anywhere

5 platforms

Configure once, paste anywhere an iframe fits. Five shelves, one share link, no signup on the receiving end.

Notion

Inline widget for study dashboards and project pages.

OBS Studio

Transparent overlay for live streams, Zen mode on.

Obsidian

Live countdowns inside markdown notes and vaults.

Figma

Live timers in prototypes and presentation decks.

Your Site

One iframe snippet for any HTML page or CMS.

Popular Guides

04 guidesAll guides →

Field notes for classrooms, streams, and study desks. Start with these four, then work the full manual.

01Education

Classroom Timer Setup

Exams, reading blocks, and activities with students.

Read guide
02Streaming

OBS Timer Overlay

Transparent countdowns for Twitch and YouTube streams.

Read guide
03Tools

Notion Timer Widget

Pomodoro and countdown timers inside Notion.

Read guide
04Focus

Pomodoro Technique

Work and break intervals that hold focus.

Read guide

Aesthetically Engineered

Designed with geometric consistency and flat glass lines to integrate seamlessly into any workflow layout.

Custom Color Presets

Match your exact workspace accent color or select our pre-configured color schemes to blend in.

Drift-Free Precision

Maintains time counts by recording absolute timestamps on render loops, bypassing standard wiggles and intervals delay.

Zero Friction

No account creation, no tracking script logs. Simply customize your parameters, grab the code, and embed.

CleanStopwatchPro
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Timers perfected for deep focus.

Watermark-free Notion & OBS embeds, 60+ canvas themes, 27+ procedural voices. 14-day money-back guarantee.

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Frequently Asked Questions

07 answers

Field notes

Answers, before you ask.

Setup, accuracy, and embedding — the short version. For the long version, the guides walk through every step.

Browse all guides Open Timer App
How do I embed this timer in Notion?
Copy the configurator share URL (for example, the /embed/ address) and paste it into your Notion page. Select “Create Embed” from the Notion context menu, then drag the handles to resize it.
Can I customize the colors, alarm sound, and modes?
Yes. On the configurator page you can pick a theme, remix the palette, change the digit font, set Pomodoro intervals, and choose an alarm sound so the widget blends into your OBS stream or workspace.
Is this online timer accurate?
Yes. Standard intervals drift when the main thread is busy, but CleanStopwatch compares high-precision browser timestamps against absolute start times, so the display never lags behind.
Does it work on mobile browsers?
Yes. The layout is responsive down to small phones, the geometry scales cleanly, and all controls are touch-friendly across Safari on iOS, Chrome on Android, tablets, and desktops.
Is CleanStopwatch suitable for classrooms and teachers?
Yes. The clean display, Zen mode, and readable high-contrast digits work well for exams, reading blocks, and activities. It runs entirely in the browser with no account needed.
How do I set up this timer as an OBS Studio stream overlay?
Customize the colors and layout in the configurator, copy the widget URL, and add it as a Browser Source in OBS Studio or Streamlabs. Enable a transparent background to overlay the timer on your scene.
How do I show the timer full screen on a smartboard?
Open the timer app and press the fullscreen button (or the F key) to hide the browser chrome and settings, leaving a clean countdown that reads clearly from the back of the room.

Ready to configure your timer?

Create custom stopwatches, count-downs, or Pomodoro study blocks instantly.

Customize Widget