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Convert Unix timestamps to dates and back.
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Unix Timestamp Converter turns Unix time into a readable date and converts a date back into a Unix timestamp. Paste a value in seconds or milliseconds and the unit is detected automatically: you get the ISO 8601 time in UTC, the date in your local time zone, and the timestamp in both seconds and milliseconds, each with its own Copy button. For the reverse, pick a local date and time to get the matching Unix seconds, milliseconds and ISO string. Use current time fills both sides with the present moment. All conversion happens in your browser.
Open Unix Timestamp Converter
Launch Unix Timestamp Converter directly in your browser — there is nothing to download, install, or configure first.
Add your input
Paste your text or load your file into Unix Timestamp Converter to begin — no preparation or cleanup needed.
Choose a format and convert
Pick the target format or options and run Unix Timestamp Converter. The conversion happens instantly on your device.
A 10-digit value is usually seconds and a 13-digit value milliseconds. The converter decides automatically — anything from 100,000,000,000 upwards is treated as milliseconds — and shows which unit it used.
Results are shown in UTC (ISO 8601) and in the time zone set on your device. The date picker is also read in your local time zone.
Yes. Enter a negative timestamp, such as -86400 for 31 December 1969, and it is converted like any other value.
The field accepts whole numbers only, so remove any spaces, commas or decimal point. Microsecond and nanosecond values are not recognised, so trim them to 13 digits first.
Yes. Unix Timestamp Converter is completely free, with no account, no paywall, and no usage limits.
No. Unix Timestamp Converter works instantly in any modern web browser — there is no software to install, no extension, and no sign-up.