Batch Epoch Converter
How to Use
Paste one or more Unix timestamps, one per line or comma-separated. Each timestamp is converted to ISO 8601, UTC, and local time formats. Both seconds and milliseconds are auto-detected.
What is Unix Epoch Time?
Unix epoch time (also called POSIX time or Unix time) is a system for tracking time as a running total of seconds since January 1, 1970 00:00:00 UTC — known as the Unix epoch. This format is widely used in operating systems, databases, APIs, and log files because it is timezone-independent and easy to store as a single integer. This batch converter lets you decode multiple timestamps at once, saving time when working with large datasets.
Epoch Timestamps
Unix timestamps count the seconds (or milliseconds) since January 1, 1970 00:00:00 UTC. Values below 10^12 are treated as seconds; above as milliseconds. Invalid entries are marked with an error.
Common Use Cases
- Log analysis — convert timestamps from server logs to human-readable dates for debugging
- Database debugging — decode epoch values stored in database columns to verify data integrity
- API development — translate timestamp fields in API responses to confirm correct behavior
- Data migration — verify that timestamps are preserved accurately when moving between systems
- Incident investigation — quickly convert multiple timestamps from alerts and logs during outage analysis
Tips
You can paste timestamps in mixed formats — seconds and milliseconds can be combined in the same input. The tool auto-detects the precision of each value. If you see unexpected dates, check whether your timestamps are in seconds or milliseconds. Common sources like JavaScript's Date.now() return milliseconds, while many Unix command-line tools output seconds.
Privacy
All processing happens in your browser. No data is sent to any server.