Time & Date Converter Tools
Convert Unix timestamps, calculate ages, and generate cron expressions. Free online time tools for developers — all 100% client-side. Perfect for DevOps engineers working with cron scheduling, log timestamps, and date arithmetic. Convert between epoch milliseconds, seconds, and human-readable dates instantly.
6 Time & Date Converter tools
- Cron Expressions Reference — Explore common cron expression patterns with examples and explanations.
- Epoch Timestamp Converter — Convert Unix timestamps to human-readable dates.
- Age Calculator — Calculate exact age between two dates.
- Cron Helper — Generate and explain cron schedule expressions.
- UUID v1 Generator — UUID v1 is timestamp-based — related to time tools.
- What is Cron? — Learn cron expression syntax and scheduling patterns.
Which time tool do I need?
Seeing a number like 1730332800 in a log or database? The Epoch Timestamp Converter turns Unix timestamps (seconds or milliseconds) into readable dates in UTC and your local time zone, and back again.
Scheduling a job? Cron Helper builds a cron expression and explains it in plain English; the Cron Expressions Reference lists common schedules you can copy. The Age Calculator gives the exact years, months and days between two dates.
Common time pitfalls
Mixing seconds and milliseconds is the classic bug: a 13-digit timestamp is milliseconds, a 10-digit one is seconds. Store and transmit times in UTC and convert only for display. Cron runs in the server's time zone, so a job set for 09 on a UTC server runs at 09 UTC.