Milliseconds Timestamp to Date
Convert a 13-digit millisecond Unix timestamp to a readable date. Works for JavaScript Date.now() and Java System.currentTimeMillis() values.
Part of the free Unix Timestamp Converter. Runs in your browser — nothing is uploaded.
Milliseconds Timestamp to Date
JavaScript and Java use milliseconds, so their timestamps have 13 digits instead of 10. Paste a value like Date.now() returned and the converter shows the exact date, including the millisecond part.
Worked example: A 13-digit millisecond timestamp
Epoch (milliseconds)
1700000000123
UTC date
2023-11-14T22:13:20.123Z
Practical tip
In JavaScript, new Date(ms) takes milliseconds. If you have seconds, multiply by 1000 first: new Date(seconds * 1000).
How to use this Unix Timestamp
- 1Use the live tool above — it runs entirely in your browser and never uploads your data.
- 2Paste the sample from the worked example, or use your own input.
- 3Copy the result, then adapt the same steps in your editor, script, or pipeline.
Milliseconds Timestamp to Date FAQs
How do I tell seconds from milliseconds?
Today's timestamps have 10 digits in seconds and 13 digits in milliseconds. 16 digits usually means microseconds.
Which languages use milliseconds?
JavaScript and Java use milliseconds. Python's time.time(), PHP's time() and most Unix tools use seconds.
More Unix Timestamp pages
- Epoch to Date ConverterConvert an epoch or Unix timestamp to a readable date and time. Paste seconds or milliseconds and get UTC and local time instantly.
- Convert a Date to a Unix TimestampConvert a calendar date and time to a Unix timestamp in seconds. Enter a date, choose a timezone and copy the epoch value.
- Current Unix TimestampGet the current Unix timestamp in seconds and milliseconds. See how to read epoch time now in JavaScript, Python, Bash and SQL.
- Convert Epoch to UTCConvert an epoch timestamp to a UTC date and time. See the ISO 8601 string and avoid local-timezone confusion when reading logs.
- What Date Is Unix Timestamp 1000000000?Unix timestamp 1000000000 is the "billennium": the moment epoch time reached one billion seconds. See the exact date and how to convert any timestamp.
- Year 2038 Problem and Timestamp 2147483647Timestamp 2147483647 is the largest 32-bit signed Unix time. Convert it to see the date and learn how to avoid the Year 2038 problem.
- Unix Timestamp to ISO 8601Convert a Unix timestamp to an ISO 8601 string like 2026-01-01T00:00:00Z. Ideal for APIs, JSON payloads and logging formats.
- Convert a Unix Timestamp to a Date in JavaScriptConvert a Unix timestamp to a Date in JavaScript with new Date(ts * 1000). Check your result with the live converter and avoid the seconds vs milliseconds trap.
- Convert a Unix Timestamp in SQLConvert Unix timestamps to dates in MySQL with FROM_UNIXTIME and in PostgreSQL with to_timestamp. Verify the expected value with the converter.