CRON Parser
Parse CRON expressions, describe them in plain language, and preview the next 10 runs.
Tool code processes selected files and entered content in your browser and does not submit them to a TOOLGRID processing endpoint. TOOLGRID measures tool usage, not the content you enter.
- No TOOLGRID input upload
- No account
- Review before copy
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What this tool does
Validate CRON syntax, get a human-readable description, and see upcoming execution times.
CRON Parser converts a 5 or 6-field expression into plain language and shows the next 10 execution times.
Preset buttons cover the most common schedules.
Where this tool earns its place
Paste the CRON expression from a config file and confirm the plain-language schedule matches the intended run cadence.
Preview upcoming runs in your local timezone before pasting the schedule into an app, CI workflow, or automation platform.
Start from common schedules like hourly, daily, or weekly, then adjust the fields and preview the next run times.
What to check before relying on the result
- Performance and maximum practical input size depend on browser memory, device speed, and the structure of the input.
- Review the generated result before replacing or publishing an original file.
Open a nearby browser tool when you need to validate, convert, or reuse the result.
How to use
01Use Cases
Paste the CRON expression from a config file and confirm the plain-language schedule matches the intended run cadence.
Preview upcoming runs in your local timezone before pasting the schedule into an app, CI workflow, or automation platform.
Start from common schedules like hourly, daily, or weekly, then adjust the fields and preview the next run times.
Tips & Tricks
- 01Validate before copying
If the input parser reports an error, fix the source value first instead of copying a partial result into code, config, or documentation.
- 02Keep secrets local
The tool runs in your browser, but you should still avoid pasting long-lived production secrets into any shared or screen-recorded session.
- 03Check whether your scheduler supports seconds
Some systems expect five fields, while others accept a leading seconds field. Match the expression format to the scheduler you will paste it into.
- 04Be explicit with ranges and steps
Values like */5 and 1-5 are compact but easy to misread in reviews. Use the plain-language output and next-run preview to confirm the final intent.
- 05Local preview may differ from server timezone
The preview uses your browser timezone. If production runs in UTC or a fixed region, translate the intended hour before deploying the schedule.
FAQ
02Does it support 6-field expressions with seconds?
Yes. Add a seconds field at the start: second minute hour day month weekday.
What syntax is supported?
* (every), */n (every n), n-m (range), n,m (list), and combinations like 1,3-5,*/2.
What timezone are the run times shown in?
They are shown in your browser's local timezone.