Free, browser-based utilities for everyday developer workflows

Timestamp Converter

Convert Unix epoch timestamps (seconds, milliseconds, microseconds, nanoseconds) to human-readable date/time and back. Runs locally in your browser. No uploads.

  • Convert Unix epoch seconds/milliseconds to dates.
  • Convert date/time to epoch quickly.
  • Outputs seconds, ms, microseconds, and nanoseconds.

Epoch -> Date

Mode:
Waiting for input
Local
UTC
ISO (UTC)

Date -> Epoch

Tip: if the text has no timezone (e.g. "2025-12-26 16:00:00"), it is treated as local time.
Waiting for input
Unix seconds
Unix milliseconds
Unix microseconds
Unix nanoseconds
Notes
  • This tool does not send data to a server.
  • Local time formatting depends on your device locale/timezone settings.
  • Share button creates a link like ?epoch=....
  • Microseconds and nanoseconds outputs are derived by multiplying the seconds value — they are not independently measured.

How to use Timestamp Converter

Enter a Unix timestamp in seconds or milliseconds to convert it to a human-readable UTC and local time, or enter a date and time to get the corresponding Unix epoch value. ISO 8601 strings are also supported in both directions.

Common use cases

Backend developers use this to decode timestamps in log files and database records during debugging. QA engineers use it to verify that time-based logic in APIs returns correct epoch values, and data analysts use it to convert timestamps between time zones when working with multi-region data.

Why run this in your browser?

All processing happens locally in your browser. Your data never leaves your machine, making it safe for sensitive payloads, internal API responses, and confidential configurations.