How to Use
- Choose Timestamp โ Date or Date โ Timestamp.
- Enter a value or pick a date; click Use Now if needed.
- Copy the format you need (ISO/RFC/Unix/Relative).
- Use the timezone panel to confirm local vs UTC display.
Core Features
- Convert timestamps to date-time and back in one click.
- Detect seconds vs milliseconds automatically to prevent unit mistakes.
- Output ISO 8601, RFC 2822, and Unix seconds/millis formats.
- Show human-friendly relative time like โ2 hours agoโ or โin 5 minutesโ.
- Compare the same instant across local, UTC, and custom offsets.
- Copy results instantlyโeverything stays local and private.
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Calculation Logic
- A Unix timestamp represents a UTC instant (timezone-agnostic).
Intl.DateTimeFormatrenders that instant in different timezones.- Relative output is computed from a delta and can be formatted via
Intl.RelativeTimeFormat.
FAQ
- Is it free?
- Yes.
- Is my input uploaded?
- No. Conversions run locally in your browser.
- How do I get โ2 hours agoโ style output?
- Enable relative output and weโll compute the delta automatically.
- Why do timestamps look different across timezones? (Technical)
- The timestamp is a fixed UTC instant; only the display timezone changes. Compare local vs UTC to verify.
- How do I avoid seconds vs milliseconds confusion?
- Turn on auto-detect so the tool infers units from length and range.