SECTION_01 / 04
Synchronized stopwatch
Based on the absolute clock to stay accurate in the background. Runs in your browser, with no installation.
BACK_TO_TOOLSFICHE_OUTIL / CHR_SE
STOPWATCH MODULE — CHR_SE
Synchronized stopwatch
Based on the absolute clock to stay accurate in the background.
Synchronized stopwatch — a free tool, accessible directly in your browser, with no installation or account creation.
Instant
100% local
No sign-up
STOPWATCH
Measure with: Synchronized stopwatch
Based on the absolute clock to stay accurate in the background.
READYSTOPWATCH
00:00:00.00
RECOMMANDATIONS
Recommended settings
Typical settings and limits for this tool.
REC_01
10 ms
Standard precision
Sufficient for sport and productivity.
REC_02
1 ms
High precision
Fine measurements: science, debugging.
REC_03
∞
Unlimited laps
As many laps as needed.
REC_04
24 h
Maximum duration
No noticeable drift.
METHODOLOGIE
How to use it
01
STEP_01
Start the measurement
Click Start to begin timing.
02
STEP_02
Pause or lap
Pause the measurement or record a split time.
03
STEP_03
Reset
Reset to zero to start a new measurement.
CAS_USAGE
Typical use cases
USE_01
Sport & training
Sprints, laps, HIIT sets.
USE_02
Productivity
Time spent on a task, focus.
USE_03
Cooking & everyday life
Recipes, games, timed exercises.
CONTENU_SEO
Everything about: synchronized stopwatch
Full guide: uses, how it works, privacy and complementary tools.
SECTION_02 / 04
Free and no sign-up
No account, no email required. Use the tool as much as you need.
SECTION_03 / 04
100% local and private
No data sent to a server. Privacy Policy.
SECTION_04 / 04
Other chronometre tools
Discover all our .chronometre tools.
FAQ_CHR
Frequently asked questions — Synchronized stopwatch
Basé sur l’horloge absolue pour rester précis en arrière-plan. Tout fonctionne en local dans votre navigateur, sans inscription ni installation, gratuitement.
Oui. Aucune donnée n'est envoyée à un serveur. L'outil s'exécute entièrement dans votre navigateur, sans cookie de tracking ni compte utilisateur.
Oui, tant que l'onglet reste ouvert. La précision est basée sur l'horloge système, sans dérive même en changeant d'onglet.
Non. Aucun compte, aucun email, aucune inscription. C'est gratuit, instantané et accessible à tous depuis n'importe quel navigateur moderne.
AUTRES_CHR
Other chronometres available
Digital stopwatch
Digital display of elapsed time to the hundredth of a second.
Simple stopwatch
Start, pause, reset: the essentials.
Lap stopwatch
Record each lap with a single click.
Split times
Track split times during a race.
High precision
Millisecond display for detailed measurements.
Multi-person
Time several participants in parallel.