— paste a unix timestamp or date string // client-only

unix (sec) —

unix (ms) —

iso 8601 —

utc string —

local —

relative —

day of week —


              curl -sX POST 'https://api.whittly.dev/v1/timestamp/convert' \
  -H 'Authorization: Bearer $WHITTLY_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"input":"1716000000"}'


              const res = await fetch('https://api.whittly.dev/v1/timestamp/convert', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer ' + apiKey,
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({ input: "1716000000" }),
});
const data = await res.json();


              const { data } = await axios.post(
  'https://api.whittly.dev/v1/timestamp/convert',
  { input: "1716000000" },
  { headers: { Authorization: 'Bearer ' + apiKey } }
);

// probulk conversionpro·history syncproupgrade →

// about this tool

Unix timestamps count the seconds (or milliseconds) elapsed since January 1, 1970 00:00:00 UTC. They are timezone-independent and used in databases, APIs, and log files. This converter turns them into human-readable dates and converts dates back to timestamps.

// when to use

Decode a timestamp from an API response or database field
Find the timestamp for a specific date to use in a query
Convert between UTC and local time
Calculate the difference between two timestamps

// faq

Milliseconds or seconds?

Unix timestamps are traditionally in seconds, but JavaScript (and many modern APIs) use milliseconds. A 13-digit number is milliseconds; a 10-digit number is seconds. The converter auto-detects the unit.

What is the Year 2038 problem?

32-bit signed integers can only represent timestamps up to January 19, 2038. Modern systems use 64-bit integers, so this is largely solved — but old embedded systems may still be affected.

// related tools

// about this tool

// when to use

// faq