Seven samples · no storage

Check your device clock accuracy

Measure whether your device clock is ahead or behind using seven edge-clock samples, median filtering, round-trip timing and a visible uncertainty estimate.

Run the measurement

The test compares your browser clock with TimeNivo’s edge response and uses the midpoint of each network trip.

Sample 1

Sample 2

Sample 3

Sample 4

Sample 5

Sample 6

Sample 7

Preparing the first test…

Method and privacy. Time-zone calculations use IANA identifiers through the browser or edge runtime. Inputs remain local unless you explicitly create a share link, vote, or booking. Share records expire automatically. Reviewed 2026-07-29. Sources · Privacy · Accuracy