Key capabilities
- Preview upcoming runs
- Readable explanation
- Frequency and compatibility hints
- Common schedule examples
Parse 5-field Unix cron and 6-field cron expressions with seconds, then show field meanings, upcoming run times, and risk hints.
Enter an expression to parse it locally. Supports Unix 5-field cron and 6-field cron with seconds.
Format: minute hour day month weekday; with seconds: second minute hour day month weekday. Quartz ? is treated as a wildcard.
Generate an expression from common scheduling patterns, then copy or apply it.
0 9 * * *Load common, platform-specific, and edge-case expressions to inspect previews and diagnostics.
Runs every 5 minutes.
Calculated from the current time and selected timezone.
Automatically keeps recent valid cron combinations.
Save common jobs and restore them in one click.
Package the current parse result as Markdown or JSON for sharing, archiving, and debugging.
Best for issues, docs, and operations notes.
# Cron Expression Parser
- Expression: `*/5 * * * *`
- Valid: No
- Format: Unix 5-field
- Target runtime: Auto detect
- Timezone: Local timezone (Browser local timezone)
- Generated at: -
## Readable
Runs every 5 minutes.
## Field breakdown
| Field | Value | Hint |
| --- | --- | --- |
| Minute | `*/5` | Every 5 units |
| Hour | `*` | Any value |
| Day | `*` | Any value |
| Month | `*` | Any value |
| Weekday | `*` | Any value |
## Upcoming run times
| # | Local time | ISO |
| --- | --- | --- |
| - | - | - |
## Diagnostics
- **info** Waiting for expression: Enter a cron expression to start parsing.Best for logs, tickets, or automation workflows.
{
"tool": "Cron Expression Parser",
"generatedAt": null,
"baseTime": null,
"expression": "*/5 * * * *",
"valid": false,
"format": "Unix 5-field",
"scheduler": {
"value": "auto",
"label": "Auto detect"
},
"timezone": {
"value": "local",
"label": "Local timezone (Browser local timezone)",
"resolved": null
},
"readable": "Runs every 5 minutes.",
"fields": [
{
"key": "minute",
"label": "Minute",
"value": "*/5",
"hint": "Every 5 units"
},
{
"key": "hour",
"label": "Hour",
"value": "*",
"hint": "Any value"
},
{
"key": "dayOfMonth",
"label": "Day",
"value": "*",
"hint": "Any value"
},
{
"key": "month",
"label": "Month",
"value": "*",
"hint": "Any value"
},
{
"key": "dayOfWeek",
"label": "Weekday",
"value": "*",
"hint": "Any value"
}
],
"nextRuns": [],
"diagnostics": [
{
"severity": "info",
"title": "Waiting for expression",
"detail": "Enter a cron expression to start parsing."
}
]
}Enter a cron expression to start parsing.
Explain schedules and preview upcoming runs. Parse 5-field Unix cron and 6-field cron expressions with seconds, then show field meanings, upcoming run times, and risk hints. The core workflow is designed to run in your current browser.
Yes. Cron Expression Parser opens in a modern browser and does not require desktop software installation.
Common use cases include Verify server scheduled jobs before shipping; Spot overly frequent jobs or date-rule ambiguity.
The core processing workflow is designed to run locally in the browser. Key capabilities include Preview upcoming runs, Readable explanation, Frequency and compatibility hints; account, comments, and anonymous analytics may still create normal site requests.
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