什么是 Timestamp DateTime Converter？

This free Timestamp DateTime Converter turns any common time representation into every other format in one panel. Paste a Unix epoch (seconds or milliseconds), ISO 8601 (with or without offset), RFC 2822 / HTTP Date, SQL/MySQL datetime, date-only, or a human-readable string — auto-detect picks the source, or override it when needed. Outputs include Unix s/ms, ISO, ISO with offset, RFC 2822, HTTP Date, SQL, local and UTC strings, and a long locale format, each with one-click copy. Choose browser local time or a fixed offset (UTC, IST +5:30, EST, PST, and more). Relative hints like “3 hours ago” help sanity-check the instant. Everything runs client-side with the JavaScript Date API — no signup and no uploads.

如何使用 Timestamp DateTime Converter

1. Paste or type a timestamp or datetime in the input field (or tap Now).
2. Confirm the detected format badge, or set “Treat input as…” if auto-detect is wrong.
3. Pick Browser local or a fixed UTC offset for SQL/local-style fields.
4. Copy any output with Copy, or use “Use as input” to round-trip check a format.
5. Fix typos if an error appears — invalid strings never crash the page.

常见用例

• Converting an API Unix ms value into ISO 8601 for logs
• Turning a MySQL datetime into epoch seconds for debugging
• Checking RFC 2822 email dates against UTC and local time

常见问题

How do I tell Unix seconds from milliseconds?

A typical 10-digit value is seconds; 13-digit values are milliseconds. The tool shows a tip when the length matches either pattern.

Does timezone mode change the instant?

The underlying UTC instant stays the same. Timezone/offset only changes how wall-clock formats (SQL, ISO+offset, local, human) are displayed. Fixed offsets do not apply DST.

Is my data uploaded?

No. All parsing and formatting run in your browser. Nothing is sent to a server.

Is this free?

Yes. No signup, no account, and no watermark.