Timestamp Batch Converter

Convert many Unix timestamps at once

Log exports, analytics dumps, and webhook payloads often mix hundreds of epoch values. Paste one timestamp or date per line and decode to ISO-8601 UTC (or local strings) or encode human-readable dates back to Unix seconds. The tool auto-detects second, millisecond, and microsecond epochs by digit length and flags bad lines without stopping the batch.

When to use batch mode

• SIEM / audit logs, turn 1697635200 columns into readable incident timelines.
• API QA, verify JWT exp claims or webhook created fields in bulk.
• Data cleanup, convert spreadsheet date strings to epoch before loading a warehouse.

For single-value conversion with time zones, see Convert Human Time to Unix Time. For nanosecond precision, use Unix Nanoseconds Converter.