Timestamp converter
Seconds through nanoseconds, batches and date boundaries.
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Timestamp & date
Current milliseconds
Date boundaries
1d 1h 1m 1s
Conversion result
Nanoseconds use integers throughout. Lower precision floors toward negative infinity. Ambiguous or nonexistent DST local times are rejected; provide an explicit UTC offset.
How to use, privacy & sources
How to use & assumptions
01 / Choose seconds, milliseconds, microseconds or nanoseconds explicitly, then a display timezone. Use one timestamp per line for batches.
02 / Use ISO local dates. Add an explicit offset for ambiguous DST times, such as 2026-11-01T01:30:00-04:00.
Privacy and results
Files and inputs are processed in this browser, without sending them to our servers. Saving scenarios is explicit and stores them on this device; clear site data on shared devices.