Unix Timestamp Converter — Epoch Time to Date Online

Unix timestamps — the number of seconds since January 1, 1970 — are how computers store time internally. But 1714521600 means nothing to a human. Our Timestamp Converter translates between epoch time and human-readable dates in both directions, handling seconds, milliseconds, and multiple time zones.

What Is a Unix Timestamp?

A Unix timestamp (also called epoch time or POSIX time) counts the number of seconds elapsed since midnight UTC on January 1, 1970. It is timezone-agnostic, monotonically increasing, and used by virtually every programming language, database, and operating system as the standard way to represent a point in time.

How to Use Our Timestamp Converter

1. Paste a Unix timestamp (seconds or milliseconds) to convert it to a human-readable date and time.
2. Or enter a date and time to convert it to a Unix timestamp.
3. Select your timezone to see the local equivalent, or keep it in UTC.
4. The tool auto-detects whether the input is in seconds or milliseconds based on its magnitude.

Why Use an Online Timestamp Converter?

• Quick debugging: Logs, database records, and API responses often contain raw timestamps. Converting them instantly tells you when an event actually occurred.
• Millisecond support: JavaScript uses millisecond timestamps (13 digits). This tool recognizes the difference automatically.
• Timezone handling: See the same moment in UTC, your local time, or any other timezone without doing mental arithmetic.
• Bidirectional: Convert dates to timestamps just as easily, useful for setting expiration times or scheduling events in APIs.

Common Use Cases

Backend developers debugging production issues check timestamps in log files to reconstruct event timelines. When a database record shows created_at: 1714521600, converting it instantly reveals it was May 1, 2024 at midnight UTC, helping correlate events across services.

API developers setting token expiration, cache TTLs, or scheduling webhooks need to convert between human-readable dates and epoch seconds. Getting the timestamp for "30 days from now" is faster with a converter than calculating it manually.

Data analysts working with datasets that store dates as integers — common in exports from legacy systems, analytics platforms, and IoT devices — use converters to sanity-check the data before processing.

Tips and Best Practices

• Always store and transmit timestamps in UTC. Convert to local time only at the display layer.
• Be aware of the Year 2038 problem — 32-bit signed integers overflow on January 19, 2038. Use 64-bit timestamps in new systems.
• When comparing timestamps across systems, check whether they use seconds or milliseconds. A 1000x mismatch is a common bug.

Ready to try it? Use our free Timestamp Converter now — no signup required, works entirely in your browser.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). It provides a timezone-independent way to represent a moment in time as a single integer.

What is the Year 2038 problem?

Systems using 32-bit signed integers to store Unix timestamps will overflow on January 19, 2038, wrapping to negative values. 64-bit systems are unaffected. This is analogous to the Y2K problem.

How do I tell if a timestamp is in seconds or milliseconds?

Count the digits. A 10-digit number (e.g., 1714521600) is seconds. A 13-digit number (e.g., 1714521600000) is milliseconds. JavaScript uses milliseconds; most other languages use seconds.