Developer Tools
Validate whether a value looks like a Unix timestamp in seconds or milliseconds.
Use this Unix Timestamp Validator to check whether a value is a plausible Unix timestamp and whether it appears to be in seconds or milliseconds. It is useful for API debugging, database inspection, logs, event data, payload checks, and verifying whether a numeric time value is likely a valid Unix timestamp before converting or storing it.
Use this Unix Timestamp Validator to check whether a value is a plausible Unix timestamp and whether it appears to be in seconds or milliseconds. It is useful for API debugging, database inspection, logs, event data, payload checks, and verifying whether a numeric time value is likely a valid Unix timestamp before converting or storing it.
Use unix timestamp validator when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
1712668800
Output
{
"valid": true,
"type": "seconds",
"iso": "2024-04-09T00:00:00.000Z"
} Useful when reviewing common Unix timestamps in API payloads.
Input
1712668800000
Output
{
"valid": true,
"type": "milliseconds",
"iso": "2024-04-09T00:00:00.000Z"
} Useful when logs or JS apps store Unix time in milliseconds.
Fix: Enter only digits for the timestamp value.
Fix: Check the length of the number and the detected timestamp type in the output.
Fix: Check whether the source system uses another format or unit.
Fix: Trim the value and remove separators before validating.
Fix: This page validates Unix timestamps only, not general date strings.
It checks whether a value looks like a valid Unix timestamp and whether it appears to be in seconds or milliseconds.
Yes. It detects both common Unix timestamp styles.
The tool returns an invalid result because Unix timestamps must be numeric.
It validates them and shows a readable UTC date, but its main purpose is validation.
The most common reason is mixing seconds and milliseconds.