Timestamp to Date Converter
Decode Unix timestamps into readable local and UTC times.
Values of 10–11 digits are treated as seconds, 12–13 digits as milliseconds — matching what APIs emit, per the Date to Timestamp converter. A date beyond year 2100 usually means a ms/seconds mixup; the auto-detect here avoids that trap.
How to use the Timestamp to Date tool
- Enter your timestamp to date in the fields above.
- Adjust any slider or type an exact number — the answer updates as you go.
- Copy the result and close the tab. Nothing you entered was sent anywhere.
About the Timestamp to Date tool
Paste any Unix timestamp — seconds or milliseconds are auto-detected — and read it back as your local time, UTC and ISO 8601.
The classic failure this prevents: passing a millisecond value to a seconds-based API (or vice versa) and getting a date in the year 50,000. Auto-detect catches it on sight.
Everything runs locally in your browser: no data is uploaded, no account is needed, and it works offline once the page has loaded.
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