Timestamp Converter

The Timestamp Converter is a free unix timestamp and epoch converter that translates Unix time into human-readable dates and back, instantly and in your browser. Paste an epoch value — it auto-detects whether it's in seconds or milliseconds — and see the local time, UTC, ISO 8601 string and relative time ('3 days ago') all at once, no manual math required.

Unix time (seconds since January 1, 1970 UTC) is the universal timestamp format underneath logs, databases, JWTs, APIs and countless config files, but it's opaque to a human reader — a number like 1700000000 tells you nothing until it's converted. This tool exists for exactly that moment: debugging why an API returned an unexpectedly old record, checking when a JWT's exp claim actually expires, reading a created_at column straight out of a database dump, or figuring out what time a cron job's next run actually corresponds to in your timezone. It's also useful for planning around scheduled jobs and expiring tokens: converting a cron job's next scheduled run, or an API rate-limit reset time delivered as a raw epoch value, into a time you can actually read at a glance.

The reverse direction is just as common: pick any date and time in your local zone and get its Unix seconds and milliseconds instantly, ready to paste into an API request, a test fixture, or a WHERE clause filtering by timestamp. A Now button grabs the current epoch time in one click, useful for testing time-based logic against 'right now'.

Conversion handles dates far into the past and future correctly, and everything runs client-side using your browser's own time zone data, so results reflect your actual local offset, not a guessed one. Negative timestamps, representing dates before 1970, are handled correctly too, which occasionally matters for historical data or date-of-birth fields stored in epoch form.