Batch Unix Timestamp Converter

Paste one timestamp per line, choose or auto-detect the unit, and export conversion results as CSV locally.

One timestamp per line

Input unit

—Rows parsed locally

CSV output

Unix/POSIX time is based on seconds since the 1970-01-01 UTC epoch. Browser date rendering uses JavaScript Date/Intl; sub-millisecond epoch arithmetic is preserved with BigInt where the tool exposes it.

How to use this Batch Unix Timestamp Converter

Convert multiple Unix timestamps to ISO UTC and local dates in one batch. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.