What is a Unix Timestamp Converter?
Unix time counts seconds since 1 January 1970 UTC: the format in logs, APIs, databases and JWT claims. Reading one by eye is impossible; this converter goes both ways instantly.
Millisecond timestamps (13 digits) are detected automatically, and the live current epoch is always one copy-click away.
Debugging tip that saves real time: when a timestamp looks absurdly far in the future or past, you are almost certainly mixing seconds and milliseconds: 1756000000 is 2025, but read as milliseconds it is January 1970 plus 20 days. JWT exp claims, API rate-limit resets and database epochs are all seconds; JavaScript Date.now() is milliseconds.
Frequently asked questions
How do I get the current timestamp in code?
JavaScript: Math.floor(Date.now()/1000). Python: int(time.time()). Go: time.Now().Unix(). SQL: strftime('%s','now') in SQLite, EXTRACT(EPOCH FROM now()) in Postgres.
Are Unix timestamps timezone-safe?
That is their superpower: the integer is identical everywhere on Earth; timezones only appear when formatting for display. Store timestamps, render local time.
Seconds or milliseconds?
Unix time is seconds; JavaScript uses milliseconds. 10 digits ≈ seconds, 13 ≈ milliseconds: detection is automatic here.
What is the year-2038 problem?
Signed 32-bit second counters overflow on 19 January 2038. Modern 64-bit systems are unaffected.
Which timezone is used?
Local time uses your browser’s timezone; UTC and ISO 8601 rows are timezone-independent.
Why is Unix time so common?
A single integer is trivial to store, compare and subtract: timezone math happens only at display time.