Cron expression inspector
Expand numeric five-field cron ranges and explain scheduling limits.
Your workspace
On-device processingLoading the tool…
Your files and text are processed in this browser. They are not uploaded to our server. Closing or refreshing the page clears your work.
A closer look
Expand numeric five-field cron ranges and explain scheduling limits.
A practical example
Example input / task: */15 9-17 * * 1-5
Common questions
What does this tool support?
Local processing only. Type inference uses one sample, not a complete schema. CIDR supports IPv4 only. Cron supports five numeric fields with *, ranges, lists and steps, not time-zone/DST execution. CSS conversion uses the font sizes you enter. Base64 downloads are not scanned for malware; never open untrusted output.
Does this tool send my input to another service?
No. Your input is processed in this browser. Required libraries are served by asdftools; input files, text and decoded links are not uploaded or opened automatically.
How to use this tool
- Enter text or choose a supported file. Everything is processed in this browser.
- Expand numeric five-field cron ranges and explain scheduling limits.
- Set the options, run, review the result and download or copy it. Keep your original.
Before you start
Local processing only. Type inference uses one sample, not a complete schema. CIDR supports IPv4 only. Cron supports five numeric fields with *, ranges, lists and steps, not time-zone/DST execution. CSS conversion uses the font sizes you enter. Base64 downloads are not scanned for malware; never open untrusted output.
Quick answers
Does this tool send my input to a server?
No. Your input is processed in this browser. Download the result before closing the page; your workspace is not saved to an account.
What should I check before using the result?
Keep the original. Check the output’s content, layout, quality and format before sharing it or using it for important work. Review the limitations above for details.
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