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Free Cron Expression Tester
Test and validate cron expressions, see the next 10 run times, and get a plain-English description — free, no signup, runs in your browser.
Next 10 Scheduled Runs
Common Examples — Click to Try
Practise it · Pipeline debugging
Plan the backfill
The schedule is right; the scheduler was down on Tuesday — compute the days that still need a run. Hard · about 12 min · runs in your browser, no signup.
How to use Cron Tester
Enter your cron expression
Type a 5-field expression like 0 9 * * 1-5, or click a common example below.
Read the description
Get an instant plain-English summary and validation of your schedule.
Check the next runs
See the next 10 scheduled run times with relative countdowns.
Frequently Asked Questions
What is a cron expression?
A cron expression is a string of 5 (or 6) space-separated fields that defines a schedule for automated tasks. The 5-field format is: minute (0–59), hour (0–23), day-of-month (1–31), month (1–12), day-of-week (0–6, where 0 = Sunday). Common symbols: * (any), */n (every n), n-m (range), a,b (list).
What does "0 9 * * 1-5" mean?
This expression runs every weekday (Monday–Friday) at exactly 9:00 AM. Breaking it down: minute=0, hour=9, day-of-month=any, month=any, day-of-week=1-5 (Mon–Fri). It is one of the most common schedules for business-hours jobs.
Does this tester support 6-field cron (with seconds)?
This tester supports the standard 5-field Unix cron format used by crontab, GitHub Actions, AWS EventBridge, and most schedulers. Some platforms (like Spring and Quartz) use a 6-field format with seconds as the first field — for those, remove the seconds field before testing here.
Why is this free when other cron testers require an account?
Most cron testers are hidden inside paid monitoring platforms like Cronitor or Better Stack. This standalone free tool runs entirely in your browser — no server, no account, no limit. SolutionGigs believes developer utilities should be free and accessible to everyone.