Developer time tools

Bulk Timestamp Converter

Paste one Unix timestamp per line and convert seconds or milliseconds to ISO UTC rows.

Timestamps, one per lineUnit mode

Line	Input	ISO UTC / Error
1	1704067200	2024-01-01T00:00:00.000Z
2	1704067200000	2024-01-01T00:00:00.000Z
3	bad	Enter a numeric Unix timestamp.

CSV output

line,input,iso,error
1,1704067200,2024-01-01T00:00:00.000Z,
2,1704067200000,2024-01-01T00:00:00.000Z,
3,bad,,Enter a numeric Unix timestamp.