How to Convert Unix Timestamps Online
Master date conversions in four simple steps:
Enter Timestamp
Paste 10-digit (seconds) or 13-digit (milliseconds) epoch numbers.
View UTC & Local
Read exact GMT/UTC and local calendar dates instantly.
Date to Epoch
Pick any calendar date and time to calculate its future or past timestamp.
1-Click Copy
Copy clean ISO 8601 strings or numeric epoch integers directly.
Key Features & Time Telemetry
Live Epoch Ticker
Real-time seconds and milliseconds counter updated every single second.
Seconds & Milliseconds Auto-Detect
Intelligently identifies 10-digit Unix seconds and 13-digit JavaScript milliseconds.
Relative Human Time
Displays friendly relative time intervals (e.g. `2 hours ago`, `in 3 months`).
100% In-Browser Privacy
All date conversions calculate locally in browser memory without network calls.
ISO 8601 & Day Number
Calculates day of the year (1-366) and standard ISO string formats.
1-Click Fast Copy
Instant clipboard copy for codebases, database queries, and log inspections.
The History of the Unix Epoch and Distributed Timekeeping
The Unix Epoch (Midnight January 1, 1970 UTC) was established in early Unix development as an unambiguous, timezone-agnostic representation of time. Instead of storing complex locale strings, databases and APIs represent moments in time as an incremental integer, eliminating timezone ambiguity across global cloud server clusters.
Nextgen Astra Epoch Converter provides the cleanest, fastest dual-direction converter for developers debugging server logs and database records.
Comparison Matrix
| Feature | Nextgen Astra | Legacy Epoch Sites | Terminal date command |
|---|---|---|---|
| Dual-Direction Conversion | Epoch ➔ Date & Date ➔ Epoch | Often Separate Pages | Requires Different Flags |
| Live Real-Time Ticker | Yes (Seconds & Milliseconds) | Static Page Load | None |
| Privacy Guarantee | 100% In-Browser (No Cloud) | Ad Trackers | Local |
| Cost | 100% Free Forever | Ad-Supported | Free |
Frequently Asked Questions
?What is Unix Epoch Time?
Unix time (or POSIX time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC (the Unix Epoch), ignoring leap seconds.
?Does this tool support timestamps in milliseconds and seconds?
Yes! 10-digit timestamps are automatically treated as seconds (Unix standard), while 13-digit timestamps are parsed as milliseconds (JavaScript `Date.now()` format).
?How does it handle timezones?
The converter simultaneously outputs Universal Coordinated Time (UTC / GMT) and your device's exact local timezone along with ISO 8601 formatting.
?Can I convert regular calendar dates back to Unix timestamps?
Yes! Use the Date-to-Epoch picker on the right to select any date and time to calculate its exact epoch seconds and milliseconds.
?What is the Year 2038 problem (Y2038)?
32-bit signed integers overflow on January 19, 2038 at 03:14:07 UTC. Modern 64-bit systems and this JavaScript tool use 64-bit floating point numbers, safely supporting dates hundreds of thousands of years into the future.