Cron Expression Parser

What is the Free Cron Expression Parser?

The free Cron Expression Parser translates any 5-field cron schedule into plain English instantly. Type or paste your cron expression into the large input field — for example 0 9 * * 1-5 — and the tool explains exactly when it will run: "At 9:00 AM, Monday through Friday". Choose from 12 preset chips for common schedules, read the field breakdown grid to understand each of the five fields, and expand the Syntax Reference to look up operators like */n, n-m, and n,m.

• → Decode unfamiliar cron expressions found in legacy codebases or server configs
• → Write new cron schedules and immediately verify they mean exactly what you intend
• → Explain cron jobs to non-technical team members or clients in plain English
• → Debug CI/CD pipeline schedules in GitHub Actions, GitLab CI, or cloud functions
• → Learn cron syntax interactively using the built-in presets and syntax reference

How to Use the Free Cron Expression Parser

1. 1 Type a cron expression into the Cron Expression input field (5 fields: minute hour day month weekday), or click a preset chip to load a common schedule.
2. 2 Read the plain-English description in the blue card below — for example: "At 9:00 AM, Monday through Friday" or "Every 5 minutes".
3. 3 Check the field breakdown grid which shows each of the five parsed values: Minute (0–59), Hour (0–23), Day of month (1–31), Month (1–12), Day of week (0–6).
4. 4 If the expression has errors (wrong number of fields, out-of-range values), a red error message explains exactly what is wrong.
5. 5 Expand the Cron Syntax Reference at the bottom to look up symbols — * (any), */n (every n), n-m (range), n,m (list).

Key Features

• 📖
  Plain English output

  Every valid cron expression is translated to a human-readable sentence describing exactly when it runs.
• ⚡
  12 quick presets

  One-click chips for the most common schedules: every minute, hourly, daily, weekdays only, monthly, and more.
• 📊
  Field breakdown grid

  Each of the five cron fields is shown separately with its value and valid range.
• 📚
  Built-in syntax reference

  Expandable table explains *, */n, n-m, n,m syntax with concrete examples.
• ✅
  Validation with messages

  Invalid expressions show a descriptive error explaining which field is wrong and why.

Example Usage

*/5 * * * *

Every 5 minutes

Frequently Asked Questions about the Free Cron Expression Parser

What is the free Cron Expression Parser?

Parse cron job expressions and translate them into plain English.

Is the Cron Expression Parser free to use?

Yes, the Cron Expression Parser is completely free. No account, subscription, or signup is required — ever.

Does my data get uploaded anywhere?

No. The Cron Expression Parser runs entirely in your browser. Your data is never sent to any server.

Does it work offline?

Yes. Once the page has loaded, the tool works without an internet connection.

Which browsers are supported?

All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.

Does this support 6-field cron expressions (with seconds)?

This tool supports the standard 5-field cron format used by Unix/Linux cron, GitHub Actions, and most scheduling platforms. 6-field expressions (with a seconds field) used by Quartz Scheduler, Spring, and some cloud services are not supported — remove the seconds field first.

What does */5 mean in a cron expression?

*/n means "every n units". In the minute field, */5 means "every 5 minutes" — equivalent to 0,5,10,15,20,25,30,35,40,45,50,55. In the hour field, */2 means "every 2 hours". It applies to whichever field position it appears in.

What time zone does cron use?

Standard Unix cron uses the server's local time zone. Cloud schedulers like AWS EventBridge, GitHub Actions, and Google Cloud Scheduler typically use UTC. Always check your specific platform's documentation to confirm which time zone applies.

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