Timestamp Converter
Unix ↔ ISO8601
Timestamp Converter is on the roadmap. In the meantime, explore the other developer tools.
What is Timestamp Converter?
Convert between Unix timestamps (seconds or milliseconds) and ISO-8601 / human-readable dates across any time zone. The current-time chip lets you grab "now" with one click. Useful for reading Unix timestamps in log files, debugging time-bounded tokens, or generating a future-dated timestamp for a scheduled job.
How do I use Timestamp Converter?
- Paste a Unix timestamp (seconds or ms) or an ISO date.
- The other format is shown immediately on the right.
- Use the time-zone selector for local-time conversions.
When should I use Timestamp Converter?
Timestamp Converter covers Unix↔ISO. To compute the difference between two dates, use Date Difference. For a recurring-schedule expression, use Cron Generator.
Seconds vs milliseconds — what is the difference?
Unix epoch is officially in seconds, but many languages (JavaScript notably) use milliseconds. The tool detects the magnitude and offers both interpretations; pick the one that matches your source.
Why does the time look off by a few hours?
Time-zone difference. The default is UTC; pick your local zone in the dropdown or paste a date with an explicit offset (e.g. 2024-06-01T12:00:00-05:00) to be unambiguous.
Why does year 2038 matter?
On 19 January 2038 the 32-bit signed Unix epoch overflows. Most modern systems use 64-bit, so it is no longer a practical concern, but legacy embedded systems may still trip on it.
Is my file uploaded anywhere?
No. Everything runs in your browser. Your files never leave your device, and there is no server component for this tool.