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.

Timestamp unit detection & CSV audit

Detect seconds, milliseconds or microseconds line by line, convert each value to ISO UTC, and flag dates that fall outside a practical review window.

—Parsed rows

—Invalid rows

Input	Detected unit	ISO UTC

Batch output is ready for logs and spreadsheets

Each row keeps its detected/selected unit and UTC ISO result. CSV and TSV copy/download actions reduce the cleanup step after conversion.

Built for developer copy-and-check workflows

v264 keeps current-time shortcuts, copy actions, practical mobile controls and the governing unit/zone assumption next to the result so common log and API timestamp checks take fewer steps.