Free online pseudocode compiler, editor and runner for Cambridge IGCSE Computer Science, Cambridge O Level Computer Science, and Cambridge International AS & A Level Computer Science (9618). Supports 0478, 0984, 2210 and 9618 pseudocode, including a native ANTLR interpreter, interactive INPUT, trace tables, records, pointers, classes, object-oriented programming, dyslexia-friendly editor settings, analytics, timed practice exams, and Cambridge past-paper questions with hidden test cases. Built as a Paper 2 practice tool with automatic grading: write Cambridge pseudocode, run it, dry-run with a trace table, then submit against hidden tests. Start with the Cambridge O Level 2210 pseudocode tutorial if you are new to Paper 2, then continue on the interactive path.
Press Ctrl+Enter to run
PseudocodeCompiler
Write code on the left, run with Ctrl+EnterWrite code above, tap Run to execute