How to use this developer tool
- Paste your input or load the provided sample.
- Adjust any options shown beneath the editor.
- Select Build Schedule or press Ctrl/Cmd + Enter.
- Review the summary, diagnostics, and exported output before committing it.
GitHub Actions Cron Builder
Build a GitHub Actions schedule trigger from standard five-field cron expressions. The builder validates ranges and common syntax, produces a ready-to-paste workflow fragment, and describes each schedule in UTC so local-time assumptions are visible.
Developer Input
Schedule fieldsAd space
What this developer tool does
Every line is parsed as minute, hour, day of month, month, and day of week. Numeric values, lists, ranges, steps, and wildcards are checked against each field range.
Every line is parsed as minute, hour, day of month, month, and day of week. Numeric values, lists, ranges, steps, and wildcards are checked against each field range.
Scheduled workflows run in UTC and may be delayed during heavy GitHub Actions load. They run from the default branch.
Example
Try the sample input built into the page. The result uses the same validation and export path as pasted content.
0 9 * * 1-5 30 2 1 * *
Use cases
- Prepare repository configuration during project setup.
- Review a proposed change before opening a pull request.
- Turn issue or workflow data into a consistent, copy-ready artifact.
Tips for reliable output
- Start with the sample to confirm the expected shape.
- Keep repository names, paths, and owner handles exact.
- Read warnings even when output is generated.
- Commit configuration changes in a separate pull request when practical.
- Test critical automation on a non-production branch first.
Processing details
The output quotes cron strings because YAML can otherwise interpret leading symbols or values unexpectedly.
This validator checks structure and numeric bounds, not every semantic combination or daylight-saving conversion.
Frequently asked questions
What input does the GitHub Actions Cron Builder accept?
Use the format shown in the sample. The page validates required fields and reports malformed lines or values before producing output.
Does the GitHub Actions Cron Builder contact GitHub or another server?
No. Processing happens in your browser and the core function makes no network request.
Can I use the generated output in a repository?
Yes, after reviewing repository-specific names, permissions, paths, and policies that a browser-only tool cannot verify.
Why might GitHub interpret the result differently?
Hosted services may apply repository context, current platform rules, presets, or permissions that are unavailable to this local check.
Can the GitHub Actions Cron Builder process Unicode text?
Yes. The input and downloaded files use UTF-8, although the target format may impose narrower naming or syntax rules.
Related developer tools
Output reference
| Item | Meaning |
|---|---|
| Output | Copy-ready YML or text |
| Processing | Local browser execution |
| Network | Not required |
Git & Repository Tools
Browse generators, parsers, validators, and helpers for Git configuration and repository workflows.
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