🕐 Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back. Supports seconds/ms, timezones, bulk conversion, and a live "Now" clock.
▸ Bulk Convert (one timestamp per line)
How to Use
1
Enter a timestamp or date
Type a Unix timestamp (seconds or milliseconds) in the first field, or pick a date/time. The tool auto-detects seconds vs milliseconds.
2
Select your timezone
Choose UTC, your browser's local timezone, or any named timezone from the dropdown. All output formats update instantly.
3
Copy any format
Click Copy next to any output row — Unix seconds, milliseconds, ISO 8601, localized date, or relative time.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is the universal standard for representing time in software systems because it has no timezone ambiguity and is easy to do arithmetic on.
What is the difference between seconds and milliseconds?
Standard Unix timestamps count seconds since epoch (10 digits for modern dates, e.g. 1714694400). JavaScript's Date.now() and many APIs return milliseconds (13 digits, e.g. 1714694400000). This tool auto-detects which you've entered based on the number of digits.
How do I convert a date to a Unix timestamp in JavaScript?
Use Math.floor(new Date("2024-05-01").getTime() / 1000) for seconds, or Date.now() / 1000 for the current time. The tool does this conversion instantly for any date you enter.
What is the Unix timestamp for the year 2038 problem?
The Year 2038 problem (Y2K38) affects 32-bit signed integers, which overflow at Unix timestamp 2147483647 (January 19, 2038, 03:14:07 UTC). Modern 64-bit systems are not affected — they can represent dates billions of years in the future.
Can I convert multiple timestamps at once?
Yes. Use the Bulk Convert section — enter one Unix timestamp per line and click Convert All to get all dates formatted at once.
Guía: Convertidor de Timestamp Unix
¿Qué es?
El timestamp Unix es el número de segundos desde el 1 de enero de 1970 00:00:00 UTC. Es el estándar universal para fechas en sistemas: bases de datos, logs de servidor, APIs. Independiente de zona horaria.
Cómo usar
- Ingresa un timestamp para convertir a fecha, o una fecha para obtener el timestamp.
- Selecciona la zona horaria para representación local.
- El resultado muestra la fecha en múltiples formatos.
Consejos
- Timestamps en ms (JS
Date.now()) son 1000× mayores que los Unix en segundos. - Almacena fechas como timestamps en BD para consultas eficientes.
- El "Año 2038" afecta sistemas con enteros de 32 bits — usa 64 bits.