Embed the Cron Expression Builder

Your GitHub Actions tutorial has a static cron string. Readers will misread it, debug it for 20 minutes, and leave frustrated. Give them an interactive builder that shows the exact next run times — one iframe, no signup, no ads. Free forever.

Get the embed code

HTML

<iframe
  src="https://auto-run-fun.github.io/autonomous-site/cron-builder.html?embed=1"
  width="100%"
  height="760"
  style="border:none;border-radius:8px;"
  title="Cron Expression Builder"
  loading="lazy"
></iframe>

Pre-load your tutorial's exact schedule

The best use case: embed the builder pre-loaded with the cron string from your tutorial. Readers see your exact schedule, can verify the next run times, get the YAML — then copy-paste with confidence. Add ?expr= to the src URL. URL-encode spaces as +.

HTML — pre-loaded to "0 9 * * 1-5" (weekdays at 9 AM)

<iframe
  src="https://auto-run-fun.github.io/autonomous-site/cron-builder.html?embed=1&expr=0+9+*+*+1-5"
  width="100%"
  height="760"
  style="border:none;border-radius:8px;"
  title="Cron Expression Builder"
  loading="lazy"
></iframe>

More examples: ?expr=0+0+*+*+0 = every Sunday midnight · ?expr=0+*/6+*+*+* = every 6 hours · ?expr=30+4+1+*+* = 1st of each month at 4:30 AM

Live preview

Preview — exactly what your readers will see

What the embed includes

🎛️

Visual field editor

One-click chips for every common value — minute, hour, day, month, weekday.

📖

Human-readable output

Every expression is immediately translated: "At 9:00 AM on weekdays (Mon–Fri)".

🕐

Next 5 run times

Calculates the next 5 exact dates/times the expression will fire, in the reader's local timezone.

⚙️

GitHub Actions YAML

Instantly generates the full on: schedule: - cron: YAML block, ready to paste into a workflow file.

📋

12 preset schedules

One-click presets cover every minute, hourly, daily, weekdays, weekends, monthly, and more.

🔗

Shareable URL

The URL updates as readers build expressions — they can bookmark or copy-share their specific schedule.

Who embeds this?

GitHub Actions tutorial authors — you wrote 0 9 * * 1-5 and your readers are going to run it wrong. Embed the builder pre-loaded with that expression. They see the next 5 run times, get the YAML block, and copy-paste with confidence. No more "why didn't my workflow run?" comments.
DevOps bloggers writing cron guides — instead of a static code block your readers have to decode in their head, give them a live builder where they can click the fields and immediately see "Every weekday at 9:00 AM."
CI/CD documentation teams — embed alongside recommended cron schedules so readers can customize before copying. One interactive widget replaces three paragraphs of explanation.
Developer course pages — live cron builder as a practice tool while teaching scheduled automation. Learners can experiment with expressions without leaving your page.
Linux sysadmin tutorials — embed next to crontab -e examples so readers can interactively verify expressions. The next-run-time preview catches timezone mistakes before they cause 3am incidents.

Sizing options

Use case	Recommended height	Code change
Full embed (with GH Actions YAML)	760px	`height="760"` (default)
Compact — builder + next runs only	580px	`height="580"`
Minimal — expression display + fields	440px	`height="440"`

Want the full reference too? The embed includes the visual builder, presets, next run times, and GitHub Actions YAML — but not the syntax explainer or FAQ. The full cron builder includes a complete syntax reference covering all special characters (* / - ,), field ranges, 20 expression examples, and a 5-question FAQ. Free, no login required.