Pattern tools
Cron Builder & Next Runs
Build a five-field recurring schedule and calculate the next runs in a named time zone.
Runs locallyRuns locally in your browser
Guide
Type a five-field expression or build a daily or weekly schedule. Choose a starting local time and its time zone. Read up to ten runs strictly after the start. This preview follows its own scheduler. Actual services may apply different daylight-saving rules.
- Choose your input
Type a five-field expression or build a daily or weekly schedule. Choose a starting local time and its time zone.
- Read the result
Read up to ten runs strictly after the start. This preview follows its own scheduler. Actual services may apply different daylight-saving rules.
- Keep your result
On a phone, select Output. Copy or download only when you want to keep the result.
Build a weekly schedule
Choose Every Monday, then Build a schedule. Select Friday and 09:00, then Apply schedule. With Start after set to 1 January 2026 at midnight in Europe/Copenhagen, the first run is Friday 2 January at 09:00. Next runs controls how many dates you see.
Starting within a repeated hour
Set Start after to 25 October 2026 at 02:30 in Europe/Copenhagen. First and Second choose which instant the list starts after. They do not change how later scheduled runs handle clock changes.
On mobile, choose Output to read the result. Clear removes both fields.
When Start after occurs twice
- Choose an occurrence: appears only when the source clock shows this time twice.
- First: use the instant before the clocks go back.
- Second: use the instant after the clocks go back.
- Choose First to start looking for runs from before the clocks went back, or Second to start later. Runs between those two moments are left out when you choose Second.
Schedule
- Daily: choose a local hour and minute.
- Weekly: also choose the weekday.
- Custom: type five standard cron fields.
Shortcuts
- Ctrl / Cmd + Enter — Run selected action
- Ctrl / Cmd + Shift + C — Copy output
- Ctrl / Cmd + S — Download output
- ? — Show shortcuts outside text fields
Shortcuts work while focus is in the workspace. Copy and download need valid output.
Common questions
- Where is my input processed?
- In this browser. Input, keys, passwords and results are not stored or sent to a server.
- How do I clear my data?
- Choose Clear to remove entered data and results from this workspace.
- How does processing start?
- Examples update immediately. After typing or changing an option the result updates when you pause.
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