How are seconds and milliseconds told apart?

Ten digits are usually seconds and thirteen are milliseconds; anything over eleven digits is treated as milliseconds.

Which time zone is shown?

"Local time" uses your device's zone, alongside UTC and ISO 8601 for reference.

Are my files or data uploaded?

No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.

Do I need to sign up or pay?

No. The site is completely free, needs no account and has no usage limits.

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🕐Unix Timestamp Converter - Timestamp to Date Online

Convert between Unix timestamps and dates. Pasting a timestamp auto-detects seconds vs milliseconds and shows local time, UTC, ISO 8601 and a relative "time from now"; you can also pick a date to get its timestamp. The current timestamp ticks live at the top.

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How to use Timestamp Converter

1Copy the live current timestamp at the top
2Under Timestamp → Date, paste a timestamp (seconds or ms auto-detected)
3Or under Date → Timestamp, pick a date and time to get seconds and ms

FAQ

How are seconds and milliseconds told apart?: Ten digits are usually seconds and thirteen are milliseconds; anything over eleven digits is treated as milliseconds.
Which time zone is shown?: "Local time" uses your device's zone, alongside UTC and ISO 8601 for reference.
Are my files or data uploaded?: No. Everything runs locally in your browser with no network upload, and is discarded when you close the page.
Do I need to sign up or pay?: No. The site is completely free, needs no account and has no usage limits.