Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.
Online Timer
Countdown timer with alarm and customizable duration.
FreeRuns in browseronline timercountdown timer
Cmd/Ctrl+Enter Primary actionCmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear/resetCmd/Ctrl+Shift+C Copy result
About Online Timer
Countdown timer with alarm and customizable duration. Set a countdown timer online for free. Choose custom minutes and seconds with an alarm sound notification when time is up. Simple and distraction-free timer. Produces high-quality output using configurable parameters and the browser's native random number APIs. Includes options for customizing format, length, and character sets. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.
Related tools: Online Stopwatch, Pomodoro Timer, Countdown Calculator
How to Use Online Timer
- Configure the options and parameters as needed.
- Click Generate to produce the output.
- Copy or download the generated result.
Frequently Asked Questions
What is Online Timer?
Set a countdown timer online for free. Choose custom minutes and seconds with an alarm sound notification when time is up. Simple and distraction-free timer.
Are generated values truly random?
The tool uses the browser's built-in cryptographic random number generator (crypto.getRandomValues) when security matters, and high-quality pseudo-random algorithms for general-purpose generation. This ensures unpredictable, non-repeating output.
Can I customize the output?
Yes, the generator provides controls such as sliders, toggles, and selection menus to fine-tune the output to your exact requirements. Adjust length, character sets, formats, and other parameters before generating.
How are random values generated?
Values are generated entirely in your browser using JavaScript's native APIs. No external service or server call is involved, which means generation is instant and your output is never transmitted anywhere.
Is Online Timer free to use?
Yes, this generator is free to use with no limits on how many values you can create. No signup or account is needed.
Is my data safe when using Online Timer?
Yes, all generation happens in your browser. Nothing is sent to a server, and no generated values are stored or tracked.