Unix Timestamp Converter

Convert Unix timestamps to ISO 8601 dates and back. Supports seconds and milliseconds. Runs in your browser.

🔒 Everything runs in your browser. Nothing is uploaded.

Examples

15162390222018-01-18T01:30:22.000Zunix to iso
2018-01-18T01:30:22.000Z1516239022iso to unix
2018-01-18T01:30:22.000Z1516239022000iso to unix ms

How it works

Available operations: Unix → ISO date, ISO → Unix (s), ISO → Unix (ms).

Everything runs locally with the same code that passes our automated correctness tests — no server, no upload.