Free PLC Simulator — No Card and No Trial Clock
Write ladder logic in a browser tab. Watch a simulated machine execute your program in real time. No download, no licence key, no credit card.
See this exact skill in the working simulator.
Watch the real browser product respond to the task on this page, then try the same practical workflow yourself. No slides, concept mockups, install, or credit card.
Try this in the browserWhat free PLC practice looks like
Move from one rung to a visible machine result
These are the practical steps the free path is designed to teach: understand the scan, operate inputs, observe outputs, then apply timers and motor-control logic to recognizable equipment.
You’re watching the page’s live simulator demo. No install or sign-in is needed for this preview. Run the guided no-account program →
Why most PLC simulators are not actually free.
If you have searched for a free PLC simulator before, you already know the drill. You find a product name, follow the link, and discover that "free" means a 30-day trial, a student licence that expires with your enrollment, or a stripped demo that will not let you save. The genuinely free tools either require a full desktop install or give you a blank canvas with no guidance on what to program.
Official vendor simulators are generally attached to their engineering environments, controller families and licensing terms. Other free runtimes can be excellent for standards-based experimentation but usually expect you to configure the project and test plant yourself. This browser path starts with a guided objective and visible machine response, then hands model-specific work back to the correct vendor tools.
The pattern is consistent: every product that runs against a real machine model either costs money or locks you into one vendor’s toolchain. For a student who wants to practice motor-start-stop logic before a job interview, or a plant engineer who wants to check a rung change before a commissioning window, that barrier is unnecessary. This PLC simulator removes it.
What you get on the free plan.
No trial clock and no credit card. Here is exactly what the signed-in free tier and the no-account first run provide.
27 free-tier scenario records
Create a free account with no credit card to use the full editor and auto-graded tests on 27 source-tagged free-tier records. The guided /try experience runs one first program without an account.
Full ladder + Structured Text editor
The same Monaco-based editor used on paid tiers. Contacts, coils, timers, counters, edge detection, compare, math, and PID function blocks — all wired up and available on the free plan.
9 learning dialects
The core tutor covers IEC 61131-3, Allen-Bradley, Siemens SCL, Mitsubishi, Omron, KEYENCE KV, Schneider Unity, Delta, Instruction List. The first 6 core lessons in every dialect are free; vendor-style support is educational rather than full firmware emulation.
Auto-graded test cases
Every free scenario ships with a scripted test suite that evaluates sequencing, interlocks, and timing. You get pass/fail feedback with failure reasons — not just a green tick.
Works on any device, any OS
Windows, Mac, Linux, Chromebook. Any modern Chrome, Firefox, Safari, or Edge release. No admin rights required. This matters in locked-down university labs and corporate environments.
Free tier never expires
There is no trial clock. Your signed-in free access remains available, while Basic and Pro unlock their respective records from the 140-record source catalog. Visible availability can vary by entitlement and staged rollout.
What is locked behind Basic and Pro.
Being straight about this: the source catalog defines 140 records marked published. The free tier covers 27 source-tagged records; Basic and Pro unlock records by tier, while visible availability can vary by entitlement and staged rollout.
- +Basic- and Pro-tier catalog access according to each record's tier and current rollout
- +Progress tracking across sessions (Basic and Pro)
- +Interview-timer mode — timed challenges to simulate a real interview (Pro)
- +Solution walk-throughs with rung-by-rung commentary (Pro)
- +Downloadable completion certificate for interview portfolios (Pro)
Other free PLC simulators — an honest comparison.
These are legitimate tools. Each is right for a specific use case. The table shows what each one actually gives you for free.
| Tool | Free price | Browser-based | Auto-graded | Scenarios included | Multi-dialect |
|---|---|---|---|---|---|
| This simulator (free tier) | Free | Yes | Yes | 27 | 9 learning dialects |
| OpenPLC Runtime | Free open-source runtime | No — desktop install | No | None (bring your own) | IEC 61131-3 only |
| PLC-Fiddle | Free | Yes | No | None (blank canvas) | Ladder only |
| LogixPro LITE | Check current licence terms | No — Windows only | Limited | Small set (AB-only) | AB only |
| CoDeSys (free edition) | Free IDE/runtime options | No — desktop install | No | None (bring your own) | IEC 61131-3 only |
| Siemens PLCSIM | Requires compatible TIA Portal licensing | No — Windows only | No | None (bring your own) | Siemens only |
Product editions and licence terms change. Verify current scope, platform support and pricing on each vendor’s official site before choosing an engineering tool.
Start with one guided PLC program — no account required.
The guided first-program experience is the fastest way to see the simulator workflow. It loads at /try with no account, form, or confirmation email. Catalog scenario play uses a free or paid account.
The no-account run teaches the core edit, run, observe and correct loop on a small PLC program. After that, a free account opens the free-tier catalog and saves progress across sessions.
This first run shows what separates a guided PLC programming simulator from a blank-canvas editor. Registered scenarios then add persistent progress and auto-graded test cases.
Can I learn PLC programming with a free simulator?
Yes — for the logic half of the trade, a free browser simulator is enough. The free tier here runs the same editor, scan cycle, and auto-graded test cases as the paid tiers. The wider platform adds wiring and fault-finding practice, interactive sensor lessons, and an article library when you outgrow the first scenarios — all built around IEC 61131-3 standard languages.
Free practice also points at a market with real money in it: O*NET (U.S. Department of Labor) lists a 2025 median wage of $73,900 for electro-mechanical and mechatronics technicians — the role many simulator users are training toward.
“Free tools usually fail you one of two ways: a blank canvas with no goal, or a demo with a trial clock. The fix is a graded objective — give a learner a machine that fails visibly and a test suite that says why, and free is enough to get hired.”
Frequently asked about the free PLC simulator.
Open the free simulator now.
No install. No credit card. No trial clock. The guided first program loads without an account — or register for 27 free-tier scenario records.
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