10 vs 13 digits
10 digits usually indicate seconds; 13 digits usually indicate milliseconds.
解决什么问题
适合处理 JavaScript Date.now()、前端日志、埋点事件或以毫秒存储的系统字段。
使用步骤
- Copy the 13-digit timestamp from JavaScript, logs, or analytics data.
- Paste it into the main timestamp tool.
- Compare the millisecond and second outputs.
- Copy the correct unit for the target API or report.
毫秒级示例
1700000000000 1700000000
1700000000000 毫秒除以 1000 后等于 1700000000 秒。
如果日期异常偏远，可能是把毫秒值当成秒处理了。
常见错误
Dividing twice
Do not divide by 1000 again if the tool already gives seconds output.
Unexpected future dates
Large values can produce unrealistic dates if interpreted with the wrong unit.
毫秒级时间戳常见问题
What does Date.now() return?
JavaScript Date.now() returns milliseconds since the Unix epoch.
How do I convert milliseconds to seconds?
Divide the millisecond timestamp by 1000, or copy the seconds output from the tool.
Why are there 13 digits?
Milliseconds need three extra digits compared with Unix seconds.