PseudoRun

What is PseudoRun?

PseudoRun is a free online editor and simulator built for IGCSE Computer Science students. It lets you write, run, and debug pseudocode with instant validation and a step-by-step debugger that tracks variables. Save unlimited programs to the cloud, work through 50+ IGCSE-style practice problems, and use exam mode with a timer to build speed. No login needed to try it, and you can get started in about 30 seconds. Friendly, exam-focused tools to make learning algorithms and preparing for IGCSE exams simple and practical.

Key features

• Write and run IGCSE pseudocode directly in your browser instantly.
• Instant syntax checking and clear error messages as you type.
• Line-by-line debugger shows variables and execution for deep understanding.
• Save unlimited programs to the cloud and access them anywhere.
• 20+ IGCSE-style exercises covering loops, arrays, and procedures.
• Exam mode provides a timer to practice under real exam conditions.