Epoch Batch Converter

Convert many Unix timestamps (seconds, milliseconds, microseconds or nanoseconds) to dates at once, or dates back to epoch.

Input	Unit	UTC (ISO 8601)	Local	Epoch s	Epoch ms
`1700000000`	s	`2023-11-14T22:13:20.000Z`	2023-11-14 22:13:20.000 +00:00	`1700000000`	`1700000000000`
`1700000000123`	ms	`2023-11-14T22:13:20.123Z`	2023-11-14 22:13:20.123 +00:00	`1700000000`	`1700000000123`
`1700000000123456`	us	`2023-11-14T22:13:20.123Z`	2023-11-14 22:13:20.123 +00:00	`1700000000`	`1700000000123`
`1700000000123456789`	ns	`2023-11-14T22:13:20.123Z`	2023-11-14 22:13:20.123 +00:00	`1700000000`	`1700000000123`
`2024-02-29T12:00:00Z`	date	`2024-02-29T12:00:00.000Z`	2024-02-29 12:00:00.000 +00:00	`1709208000`	`1709208000000`

About this batch epoch timestamp converter

Convert a whole list of Unix epoch timestamps to human-readable dates in one go, for example from log files or database exports. Seconds, milliseconds, microseconds and nanoseconds are detected automatically, and ISO dates can be converted back to epoch values.

How to use the Epoch Batch Converter

Paste one timestamp or date per line.
Optionally force the unit.
Copy the results as CSV.

Example

1700000000123  →  2023-11-14T22:13:20.123Z

Frequently asked questions

How is the unit detected?

By the number of digits: up to 11 digits are seconds, up to 14 milliseconds, up to 17 microseconds and longer values nanoseconds.

Is my data safe?

Yes. The tool runs entirely in your browser using WebAssembly. Nothing you type or upload is sent to a server, logged or stored.

Is it free?

Yes, completely free with no sign-up, no limits and no watermarks. It also works offline once the page has loaded.