CSV to SQL
Infer column types and generate CREATE TABLE + INSERT statements from CSV.
OpenExplain cron expressions and preview the next run times in any timezone. - runs entirely in your browser. Free, fast and private.
Paste five-field cron or start from a common preset.
See when the job runs in plain English.
List the next fire times in your chosen timezone.
Use the expression in crontab, K8s CronJob, or CI schedules.
Cron Calendar is a free developer utilities utility on OneDevToolkit. Explain cron expressions and preview the next run times in any timezone. It runs in your browser for this session - use the workspace on this page to try it.
Need a related step? Open the Developer Utilities hub at /developer-tools/ or the <a href="/blog/">blog</a> for longer workflows.
Processes data instantly with no server round-trips.
Your data never leaves your browser. Nothing is uploaded.
Works in any modern browser. Nothing to download or install.
No limits, no sign-up, no credit card required.
Works on desktop, tablet and mobile devices.
Beautiful in both themes. Your preference is saved.
Keyboard shortcut
Use Cron Calendar to format, validate, or transform data while debugging or reviewing a PR.
Keep payloads on your device - no upload farm between you and the result.
Chain related code tools in Recipe Studio when you need multi-step transforms.
Answers for this tool. For site-wide help, open the FAQ hub.
Cron Calendar explain cron expressions and preview the next run times in any timezone. Output stays in your browser for quick iteration.
Prefer redacted samples. Even with local processing, treat prod credentials carefully and rotate anything accidentally shared.
No. Generators and linters produce text for you to copy into Git, CI, or consoles - they do not deploy for you.
Always run official CLIs (kubectl, terraform plan, actionlint, etc.) on the final files after using Cron Calendar as a starting point.
Syntax may vary across Kubernetes/Terraform/GitHub Actions versions. Adjust generated snippets to your runtime version.
After the page loads, most authors work offline. Keep a local copy of critical manifests.
Use Sample to learn the format, edit, then Download/Copy into your editor.
Request it via Contact with the platform and version you use.