Browser tool guide
How to set up PLC Fiddle for free (no install)
An online editor for small PLC programs. Use it for the week 1 Try it, or switch to LADX Mini.
Last checked 18 Oct 2026.
What it is for
Time
Works on
Official page
Cost and terms
Free to use in the browser. We could not re-read the current terms on the official site, so check them there before you rely on it.
Not re-checked on the official site (18 Oct 2026).
What you need
- A computer, tablet or phone with a current browser (Chrome, Edge, Firefox or Safari)
- An internet connection
- Nothing to download
Open it
1.Open the PLC Fiddle site from the link on this page.
You should see: An online editor opens in your browser.
2.Start a new program.
You should see: An empty program with a place to write your logic.
3.Write one line of logic from your lesson and run it.
You should see: The result or output shows beside your program.
1.Open the PLC Fiddle site from the link on this page.
You should see: An online editor opens in your browser.
2.Start a new program.
You should see: An empty program with a place to write your logic.
3.Write one line of logic from your lesson and run it.
You should see: The result or output shows beside your program.
1.Open the PLC Fiddle site from the link on this page.
You should see: An online editor opens in your browser.
2.Start a new program.
You should see: An empty program with a place to write your logic.
3.Write one line of logic from your lesson and run it.
You should see: The result or output shows beside your program.
Check that it works
1.Type the example from the lesson and run it.
You should see: The output matches the "You should see" line in your Try it.
If something goes wrong
- The page loads but the editor is empty.
- Reload the page. Turn off extensions that block scripts and try again.
- My program shows an error.
- Read the first error line. It usually names the line with the mistake. Compare it with the lesson example.
- The site is down or slow.
- Use LADX Mini for the same practice. It is built into your portal.
If you cannot or do not want to install
LADX Mini runs inside your portal and covers the same ladder practice.
Open the browser guideLeaving it
- There is nothing to remove. Close the tab when you are done.
Which internships use it
- PLC Programming internship, in week 1.
The first 4 weeks of every internship are free. This is training, not employment, and there is no stipend. All software guides.