Time Utilities
Timestamp Converter
Convert Unix timestamps to human-readable dates and generate Unix values from dates.
The Timestamp Converter translates between Unix timestamps and human-readable dates in seconds or milliseconds. It also shows local time, UTC, and ISO 8601 formats so you can verify values quickly when working with logs, APIs, or scheduled tasks.
Conversion results
Outputs update when you convert from either direction.
Unix (seconds)
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Unix (milliseconds)
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Local time
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UTC time
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ISO 8601
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What this tool does
The Timestamp Converter translates between Unix timestamps and human-readable dates in seconds or milliseconds. It also shows local time, UTC, and ISO 8601 formats so you can verify values quickly when working with logs, APIs, or scheduled tasks.
When to use this tool
Use it when debugging time-based bugs, validating API payloads, or aligning schedules across time zones. It pairs well with Cron Expression Translator when you need to verify schedule timing, and with Season Countdown for seasonal calendar checks.
How it works
The tool converts numeric Unix values into Date objects and renders the output in multiple formats. When you provide a human date, it converts the selection into Unix seconds and milliseconds, taking your chosen timezone into account. All conversions are done locally in the browser.
Example use case
You see a timestamp in a log entry: 1698796800. Paste it into the converter and confirm it corresponds to the correct UTC time. If the system is using milliseconds instead, switch the unit and verify the corrected time before escalating the issue.
Use cases
- Convert log timestamps to local time for debugging.
- Generate Unix time values for API payloads.
- Translate milliseconds to seconds during data cleanup.
Notes & limitations
Unix timestamps are timezone-agnostic; the displayed local time depends on your device settings. Be careful with daylight saving changes when converting user-facing schedules. The date picker uses your browser locale, so confirm the intended timezone before sharing results.
When integrating with APIs, confirm whether the service expects seconds or milliseconds. A mismatched unit can shift dates by decades. If your system stores timestamps as strings, avoid rounding or truncating values unless you are certain the precision is not needed.
If you are coordinating across regions, share both the UTC timestamp and a human-readable timezone label to avoid misinterpretation. This reduces confusion during incident response or scheduling across teams.
Save conversions alongside source logs to speed up future investigations.
Double-check UTC offsets when sharing timestamps across teams.
