What is the difference between seconds and milliseconds timestamps?

A milliseconds timestamp is 1,000 times larger than the equivalent seconds timestamp, and typically has 13 or more digits for recent dates.

What happens on January 19, 2038?

That date is the well-known limit for 32-bit signed Unix timestamps in seconds — modern 64-bit systems, and this tool, are unaffected.

Is my timestamp data sent anywhere?

No — conversion happens entirely in your browser.

Can I convert a negative timestamp?

Yes — negative Unix timestamps representing dates before 1970 are supported.

Does this show my local time zone?

Yes — results include your browser's detected local time zone alongside UTC.

What if I choose the wrong unit?

The resulting date will be wildly incorrect (typically far in the past or future) — switch the unit and check again.

Outils de Date & Heure

Convertisseur de Temps Unix — Outil en Ligne Gratuit

Convertissez un horodatage Unix en secondes ou millisecondes en date.

Utiliser Cet Outil

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Your Text

Timestamp unit

Your result will appear here.

What Is Unix Time?

Unix time (or epoch time) counts the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC — a simple, time-zone-independent way for computers to represent a specific moment as a single number.

This tool converts a Unix timestamp — in either seconds or milliseconds, whichever your system uses — into a readable calendar date, shown in ISO 8601, UTC and your local time zone.

Qui Utilise Cet Outil ?

Pour les Entreprises

Convert a Unix epoch value from an API response into a readable date.

Pour un Usage Personnel

Figure out what real-world date a Unix timestamp represents.

Pour les Étudiants

Learn how Unix epoch time works for a systems or networking course.

Pour les Bureaux

Convert a timestamp stored in a database field into a readable date.

Pourquoi Utiliser Cet Outil

Fonctionnalités Clés

Seconds or Milliseconds

Choose the unit your timestamp uses.

Multiple Output Formats

See ISO 8601, UTC, local time and a relative format at once.

Instant Conversion

Results update immediately as you type.

100% Private

Converted entirely in your browser — nothing is transmitted.

Le Résultat

Avantages

No Ambiguity

Explicitly choose seconds or milliseconds instead of guessing.

See Every Format at Once

ISO, UTC, local and relative time, all in one result.

No Software Needed

Convert directly in the browser — no script or spreadsheet formula required.

Étape par Étape

Comment Utiliser Convertisseur de Temps Unix

Enter a Unix Timestamp

Type the epoch timestamp you want to convert.

Choose Seconds or Milliseconds

Select the unit your timestamp uses.

Read the Converted Date

See the matching calendar date in every common format.

Spécifications

Détails Techniques

Détail	Valeur
Entrée	Unix timestamps in seconds or milliseconds
Traitement	Not applicable — single timestamp conversion
Sortie	Exact conversion using your browser's native Date object

Vous Pouvez le Vérifier

Confidentialité & Sécurité

Ce qui se passe réellement avec votre fichier lorsque vous utilisez cet outil.

100% Client-Side

This tool runs entirely inside your browser using JavaScript — nothing you type or generate is ever sent anywhere.

No Upload, Ever

There is no file upload and no server processing step — your data never leaves your device.

Works Offline

Once this page has loaded, the tool keeps working even without an internet connection.

Nothing Stored

Nothing you enter is saved on our servers — refreshing the page clears everything.

No Tracking of Your Input

We have no way to see what you type, generate or convert with this tool.

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Astuces

Check Your API's Documentation for the Unit

Different systems use seconds or milliseconds inconsistently — check the source before converting.

Use This to Sanity-Check Expiry Timestamps

Quickly confirm a token or session expiry timestamp is in the future, not the past.

Questions Fréquentes