Web Dev Helpers
Timestamp Converter
Convert between Unix timestamps and human dates.
Right now
Unix seconds
1787333737
Unix milliseconds
1787333737460
ISO 8601 (UTC)
2026-08-21T17:35:37.460Z
Epoch → date
Date → epoch
About this tool
Paste a Unix epoch (seconds or milliseconds) to see the date in your local timezone and UTC. Or pick a date to get the Unix timestamp.
FAQs
Seconds or milliseconds?
JavaScript and most APIs use milliseconds (13 digits). Unix command line tools use seconds (10 digits). The tool detects automatically.
What timezone is shown?
Both your local timezone and UTC, side by side.
Does it handle dates before 1970?
Yes - negative epochs work, going back to roughly the year 100,000 BC in JS Date.