Cron Parser

Explain a cron expression and preview next run times.

A free cron expression parser that translates a 5- or 6-field (with-seconds) cron into plain language and predicts the next 5 run times. It supports *, ranges, lists, steps (e.g. */5) and macros like @daily and @hourly, all computed locally in your browser.

How to use

1. Paste a cron expression such as */5 * * * * or @daily into the box.
2. Read the field breakdown to see which values each part (minute, hour, day, month, weekday) matches.
3. Check “Next 5 runs” to confirm the schedule behaves as you expect.
4. If the expression is invalid, the tool names the exact field that is wrong.

FAQ

What does */5 mean?

It is a step value. In the minute field, */5 means “every 5 minutes” (0, 5, 10 … 55). Likewise */2 in the hour field means every 2 hours.

Which time zone are the run times in?

The predicted next runs are shown in your browser’s local time zone. A real server’s cron usually runs in that server’s time zone (often UTC), so verify against your deployment.

Does it support 6-field (with seconds) cron?

Yes. With 6 fields the first is treated as seconds, followed by minute, hour, day-of-month, month and weekday — the form used by schedulers like Quartz and Spring.

What if both day-of-month and weekday are set?

It follows standard cron semantics: when both are restricted (not *), the job runs if either matches (OR); otherwise all fields must match together.

Related tools

• 2FA Authenticator — End-to-end encrypted 2FA vault with live codes.
• Password Vault — Zero-knowledge vault for site logins; survives password changes.
• Data Format — Convert between JSON, YAML, TOML, CSV.
• Base64 — Encode / decode text & files in Base64.
• URL Encode — Encode / decode URL components.
• JWT Decode — Inspect JWT header & payload.