Unix时间戳换算器（支持时区）

计算原理

Paste a number and the tool infers its unit from magnitude: 1e15 or larger is treated as microseconds, 1e12 or larger as milliseconds, anything smaller as seconds, with commas, underscores and spaces stripped first. From that single date it derives eight rows: Unix seconds, Unix milliseconds, ISO 8601 in UTC, RFC 3339 carrying your timezone's offset, a long human-readable form, a relative age, day of year, and the ISO week number.

The Timezone dropdown is the control that changes the output, and UTC is force-added to the list because browsers frequently omit it. It reformats the human line, the RFC 3339 row and the relative age. The timestamp box starts at 1700000000, the Now button fills in the current second, and Batch mode opens a textarea where each line is converted independently into an ISO 8601 string and a relative age.

The timezone selector does not reach everything. The date picker beneath it reads and writes in your browser's own local time, so choosing a date while a different zone is selected will not give the result you expect, and the day-of-year and ISO-week rows are likewise derived from browser-local date components. Relative ages are deliberately rough: a month is treated as 30 days and a year as 365, so anything older than a month is approximate.

常见问题