Time tools
Free online time and date tools that run entirely in your browser. Convert Unix timestamps and time zones, calculate durations and date differences, parse cron expressions, and work out ages instantly. Private, accurate, and free.
All time tools
Age Calculator
Work out an exact age in years, months, and days from a birthdate, with a countdown to the next birthday.
Business Days Calculator
Count the working days between two dates, minus weekends and any holidays you list.
Countdown Timer
Count down a set duration or to a specific date and time, with an alarm, a desktop alert, a live tab-title countdown, and a fullscreen presentation view.
Cron Expression Parser
Translate a cron expression into plain English and preview its next scheduled run times.
Date Difference Calculator
Count the days, weeks, months, and years between any two dates, including or excluding the end date.
Duration Calculator
Add or subtract two durations and read the total in seconds, minutes, hours, days, and weeks.
Pomodoro Timer
Run focus and break sessions with a big countdown, saved lengths, optional auto-start, and an alert when each block ends.
Time Zone Converter
See one moment in time across multiple time zones at once, with offsets and day shifts.
Unix Timestamp Converter
Convert Unix epoch timestamps in seconds or milliseconds to a readable date, and back again.
Week Number
The current ISO week number, plus the week number for any date you pick.
Frequently asked questions
- Do these time tools send my data anywhere?
- No. Timestamp conversion, time zone math, duration and date calculations, cron parsing, and age calculation all run locally in your browser. Nothing is sent to a server.
- Which time tools are available?
- A Unix timestamp converter, a time zone converter, a duration calculator, a date difference calculator, a cron expression parser, and an age calculator, with more added over time.
- Does the timestamp converter support seconds and milliseconds?
- Yes. It reads Unix timestamps in seconds or milliseconds and shows the matching human-readable date, with results in both your local time and UTC.
- What does the cron expression parser do?
- It explains a cron expression in plain English and shows the next run times, so you can confirm a schedule before adding it to a job.
- Are the time tools free to use?
- Yes. Every time and date tool is free, with no account, no sign-up, and no usage limits.