Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Countdown Timer
Create a countdown to any target date and time with live days, hours, minutes, and seconds display.
Countdown Timer
Progress
0%
- Set target — Pick a future date and time using the date-time picker.
- Name your event — Optionally enter an event name to display above the countdown.
- Start — Click "Start" to begin the live countdown.
- Pause/Resume — Pause the countdown at any time and resume when ready.
- Reset — Reset the timer to set a new target date.
Does the timer work in the background?
The timer updates every second while the page is open. If you switch tabs or minimize the browser, JavaScript timers are throttled by the browser but will catch up when you return.
What happens when the countdown reaches zero?
When the countdown reaches zero, it displays "Time's Up!" and the progress bar reaches 100%. The timer stops automatically.
Can I save my countdown?
Currently, the countdown does not persist between page refreshes. You can bookmark the page and set your target date again when you return.
What is the maximum countdown duration?
There is no hard limit. You can set a target date years into the future. The timer will display days, hours, minutes, and seconds for any duration.
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