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Timestamp Converter
Move between Unix seconds, Unix milliseconds, and ISO 8601 UTC time in your browser.
Dates are normalized to UTC. Ten-digit epoch values are read as seconds; longer values are read as milliseconds.
About this tool
How it works
Interprets 10-digit values as Unix seconds and longer values as milliseconds, then uses UTC ISO 8601 output.
A practical way to use it
Translate a timestamp from an API log into a readable UTC date or create an epoch value from ISO time.
Use results as a practical aid, and verify important decisions against your own source data and qualified guidance.