Unix Timestamp to ISO 8601
Convert a Unix timestamp to an ISO 8601 string like 2026-01-01T00:00:00Z. Ideal for APIs, JSON payloads and logging formats.
Part of the free Unix Timestamp Converter. Runs in your browser — nothing is uploaded.
Unix Timestamp to ISO 8601
ISO 8601 is the standard text format for dates in APIs and JSON: sortable, unambiguous and timezone-aware. Paste a Unix timestamp and copy the ISO string to use in your payloads or database inserts.
Worked example: Seconds to an ISO 8601 string
Epoch (seconds)
1772323200
ISO 8601
2026-03-01T00:00:00.000Z
Practical tip
ISO 8601 strings sort alphabetically in chronological order when they share the same timezone, which makes them easy to use as sort keys.
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.
Unix Timestamp to ISO 8601 FAQs
What does the T in ISO 8601 stand for?
T separates the date from the time. 2026-03-01T00:00:00Z means the date 2026-03-01 at time 00:00:00 UTC.
Should APIs use timestamps or ISO strings?
ISO 8601 strings are easier to read and debug. Numeric timestamps are more compact and avoid parsing differences. Pick one convention and document it.
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.
- Milliseconds Timestamp to DateConvert a 13-digit millisecond Unix timestamp to a readable date. Works for JavaScript Date.now() and Java System.currentTimeMillis() values.
- 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.
- 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.