Unix Timestamp to Date Converter Online — Free Epoch Converter
Convert between Unix epoch seconds and human-readable dates. Supports milliseconds, ISO 8601 and your local timezone.
Paste a Unix timestamp (seconds or milliseconds) or an ISO date — the converter shows both representations side by side.
Now (seconds)
0
Now (milliseconds)
0
Now (ISO 8601)
Common use cases
- 1Translate an exp claim from a JWT into a human-readable expiry time.
- 2Convert a created_at log field into your local timezone for debugging.
- 3Plan cron schedules — confirm an epoch value matches the moment you expect it.
Frequently asked questions
Why are some timestamps 13 digits and others 10?+
10 digits = seconds since 1970-01-01 UTC. 13 digits = milliseconds. The tool detects both automatically based on length.
Does it handle leap seconds?+
No. Unix time intentionally ignores leap seconds — they are smeared at the OS level. This converter follows the same convention as every standard library.
What timezone is shown?+
ISO 8601 output is always UTC. The "Local" line uses your browser locale and timezone via Intl.DateTimeFormat.