Online Cron Converter Download
Convert and validate cron expressions with batch mode, actionable diagnostics, copy, and download (TXT/JSON/CSV). Handles large inputs with chunked processing.
How to use
- Paste one cron expression per line (5-field or 6-field with seconds).
- Click Run to validate and convert.
- Review Diagnostics for line-specific errors and hints.
- Click Copy to copy the current output, or choose a download format and click Download.
- For large files, drag & drop a .txt/.csv file or use the file picker; processing runs in chunks with progress.
FAQ
How do I convert a cron expression?
Paste a cron expression (5 fields or 6 fields with seconds) into the input and click Run. The output includes a normalized cron and a readable description.
Can I copy the conversion results?
Yes. Click Copy to copy the currently displayed output (Text, JSON, or CSV). If your browser blocks clipboard access, you can manually select and copy from the output panel.
Can I download the results?
Yes. Choose a download format (TXT/JSON/CSV) and click Download. The tool generates a file locally in your browser.
Does it support batch processing?
Yes. Enter one cron expression per line. The tool validates and converts each line and reports line-specific diagnostics.
What diagnostics do I get for invalid cron?
Diagnostics include the line number, which field failed (minute/hour/day-of-month/month/day-of-week/second), what was wrong (e.g., out of range or invalid characters), and a concrete hint to fix it.
How does the tool handle very large inputs?
Large inputs are processed in chunks (yielding back to the browser between chunks) to keep the page responsive. You can also cap processing with Max errors to stop early on noisy inputs.
What cron syntax is supported?
The validator supports standard cron patterns: *, lists (a,b), ranges (a-b), and steps (*/n or a-b/n). Quartz-only tokens like L, W, #, and ? are reported as unsupported with a hint.
Continue your workflow
Browse related tools by task. Use the improved core tools for a consistent workspace with file import, downloads and clear validation errors.