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The high-precision digital clock is a digital clock that automatically synchronizes with an Internet time server and displays "accurate time without deviation" on your computer or smartphone. You can also set a target time and count down.

How to Use

  1. Displays the exact current time.
  2. You can set a target time for countdown functionality.

How to Use the High-Precision Digital Clock

This tool automatically synchronizes with internet time servers to display "accurate time without deviation" on your computer or smartphone.

How It Works

1. Synchronization with Internet Time Servers

Retrieves the current Coordinated Universal Time (UTC) from a time API that distributes accurate time information.

2. Automatic Compensation for Network Delay

Measures the "network latency (tens of milliseconds)" during server communication and corrects the time deviation accordingly.

3. Adjusted Local Clock Display

Uses this deviation (correction value) to automatically adjust and display your PC or smartphone's clock to the "correct time."

Main Features

  • Real-Time Clock Display
    Shows the exact current time down to hours, minutes, seconds, and milliseconds.
  • Countdown to Target Time
    Lets you see at a glance "how many minutes until XX:XX." Useful for last-minute preparations before ticket sales, exam start times, deadlines, etc.
  • Time Deviation Correction (Time Synchronization)
    Automatically communicates with servers to correct your device's time error. More accurate than conventional clocks down to the millisecond.

Recommended For

  • Those who want to check exact start times for time signals or TV programs
  • Those concerned about "remaining time" during exams, certifications, or tests
  • Those competing in ticket or reservation battles where every second counts
  • Those needing precise timekeeping for server monitoring or scheduling

Usage Instructions

  1. When you open the tool, the exact current time is displayed automatically.
  2. If needed, enter a "target time" and click "Start Countdown" to display remaining time.
  3. Millisecond precision display ensures confidence even in situations requiring second-level accuracy.

Notes

This tool is available for free.

*This program was created and tested using PHP8.2.22.
*Please send us your opinions and requests (requests for improvements) for all users.