Epoch Batch Converter
Convert a whole list of timestamps at once, instead of one at a time.
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About this tool
Paste a column of timestamps from a log file, database export or spreadsheet and convert them all at once. Each line is checked separately, so seconds (10 digits for today’s dates), milliseconds (13 digits), microseconds and nanoseconds can be mixed, and lines that aren’t timestamps are flagged rather than silently skipped.
Results are shown in ISO 8601 order, in UTC or in your local time with its offset. For “Date → Unix”, enter dates like 2026-06-15 14:30:00, one per line. A date with Z or an offset such as +01:00 is read exactly as written; one without is read in the time zone you choose above, which matters during British Summer Time.