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Rhad ac am ddim Cron Expression Builder
Build, validate, and explain cron expressions for scheduled tasks. Live plain-English description, next-5-runs preview, and common pattern presets.
Runs in your browserNo sign-up, no pop-upsNid oes angen mewngofnodiAm ddim am byth
minute
(0-59)hour
(0-23)day
(1-31)month
(1-12)weekday
(0-6)
(0-59)hour
(0-23)day
(1-31)month
(1-12)weekday
(0-6)
In plain English
At 09:00 on Mon, Tue, Wed, Thu, Fri.
Next 5 scheduled runs (your local time)
- Thu, May 2809:00
- Fri, May 2909:00
- Mon, Jun 109:00
- Tue, Jun 209:00
- Wed, Jun 309:00
Common patterns
Compatible with standard Unix cron, GitHub Actions, Kubernetes CronJob, and most scheduling systems. Use * for “every”, */5 for “every 5”, 1-5 for ranges, 1,15 for specific values.
Optimize for your platform
Sut Mae'n Gweithio
1
Ewch i mewn
Rhowch eich testun neu ddata.
2
Proses
Wedi'i brosesu ar unwaith yn eich porwr. Dim gweinydd, dim aros.
3
Lawrlwythwch
Arbedwch eich canlyniad. Nid oes dim yn cael ei storio.
Pam defnyddio ein un ni?
✓Completely free — no hidden costs, ever
✓No account, email, or login required
✓Runs entirely in your browser — no uploads
✓Works on any device — phone, tablet, desktop
✓Open and ad-supported, with no tracking
✓Loads fast, with no installation needed
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