# PseudoRun - IGCSE Pseudocode Editor > Offline IGCSE/A-LEVELS pseudocode editor and simulator for Computer Science students Canonical page: [https://chrome-stats.com/d/igcse-pseudocode-editor](https://chrome-stats.com/d/igcse-pseudocode-editor) ## Overview - **ID:** `igcse-pseudocode-editor` - **Platform:** Firefox - **Type:** Firefox add-on - **Status:** Available - **Publisher:** Idrees Qazi - **Category:** other - **Daily users:** 35 - **Weekly downloads:** 2 - **Rating:** 3.00 / 5 (2 ratings) - **Version:** 2.0.0 - **Last updated:** 2026-08-21 - **First published:** 2025-11-21 - **Size:** 583 KB - **Data as of:** 2026-09-10 - **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/igcse-pseudocode-editor/) - **Website:** [https://pseudorun.tech](https://pseudorun.tech/) ## Description Complete Offline Pseudocode Learning Environment PseudoRun is the ultimate educational tool for IGCSE and A-LEVELS Computer Science students, now available as a Firefox extension that works completely offline. This comprehensive pseudocode editor and simulator helps students master Cambridge programming concepts with professional features and an intuitive interface. Key Features 🔧 Professional Code Editor - CodeMirror 6 integration with advanced syntax highlighting - Real-time syntax validation with 500ms debounced error checking - Auto-save functionality with browser localStorage - Bracket matching, line numbers, and code folding - Multiple themes including light and dark modes 🎓 Educational Tools - 22 Built-in Example Programs covering the complete IGCSE syllabus - Interactive Tutorial with step-by-step learning modules - Comprehensive Syntax Reference with Cambridge pseudocode specifications - Practice Problems with varying difficulty levels - Exam Mode with customizable timer for test simulation 🐛 Advanced Debugging - Step-by-step execution with variable state visualization - Breakpoint functionality for code analysis - Watch variables and expression evaluation - Call stack tracking for procedure/function debugging - Runtime error detection with clear error messages 📊 Output and Visualization - Animated output display showing execution flow - Variable state monitoring during execution - Input handling for interactive programs - File I/O operations support (CREATE, OPEN, WRITE, CLOSE) - Trace table generation for algorithm analysis 💾 Local Program Management - Save unlimited programs in browser localStorage - Organized program library with search and categorization - Export/import programs as text files - Program duplication and versioning support - Local program sharing capabilities 📤 Export and Documentation - Export pseudocode as PDF with proper formatting - Generate DOCX documents for assignments - Create PNG images for presentations - Print-friendly formatting with line numbers - Customizable export themes and styles Complete Offline Functionality This extension operates entirely without internet connection: - ✅ No network requests - works anywhere, anytime - ✅ No authentication required - always in guest mode - ✅ Local data storage - all work saved on device - ✅ No data collection - complete privacy protection - ✅ Fast performance - no loading delays Educational Benefits For Students: - Master IGCSE pseudocode syntax and structure - Practice problem-solving skills with instant feedback - Prepare for exams with realistic simulation - Develop computational thinking and algorithm design - Build confidence in programming fundamentals For Teachers: - Demonstrate pseudocode concepts in class - Create custom exercises and examples - Monitor student progress offline - Generate teaching materials and examples - Facilitate collaborative learning activities Supported IGCSE Pseudocode Features Data Types and Variables: - INTEGER, REAL, BOOLEAN, STRING, CHAR types - Variable declaration and assignment - Array declaration and manipulation - Constant definitions Control Structures: - IF/THEN/ELSE conditional statements - FOR, WHILE, REPEAT loops - Nested control structures - Loop counters and iteration variables Procedures and Functions: - Procedure definition and calling - Function return values - Parameter passing (by value and reference) - Recursion support with depth limits Built-in Functions: - LENGTH() for string/array operations - SUBSTRING() for string manipulation - UCASE()/LCASE() for case conversion - INT()/REAL()/STRING() for type conversion - ROUND() for number rounding - RANDOM() for generating random numbers File Operations: - CREATE, OPEN, WRITE, CLOSE file commands - READ and SEEK operations - EOF detection - Error handling for file operations Output Operations: - OUTPUT and PRINT statements - Formatted output with spacing - New line control - Variable and expression output Technical Specifications Installation and Usage
  1. Install Extension: Click "Add to Firefox" or load via about:debugging
  2. Open Editor: Click the PseudoRun icon in your Firefox toolbar
  3. Start Coding: Write pseudocode with real-time syntax highlighting
  4. Execute Programs: Click "Run" to see animated output execution
  5. Learn and Practice: Access tutorial, examples, and practice problems
  6. Save Work: Programs auto-save locally for continued learning
Perfect for Educational Institutions Privacy and Security PseudoRun prioritizes student privacy and data security: - 🔒 Zero Data Collection - No analytics or tracking - 🔒 Local Storage Only - All data stays on device - 🔒 No Authentication - No account creation required - 🔒 Offline Operation - No network connectivity needed - 🔒 Open Source - Code is transparent and auditable Continuous Learning Transform your Computer Science education with PseudoRun - The complete offline pseudocode learning environment for IGCSE and A-LEVELS success! ## Rankings - #19,016 — Overall - #67 — student - #68 — editor - #128 — text editor - #130 — css editor - #143 — offline ## Permissions and access ### Permissions - `storage` - `tabs` ## Safety - **Risk impact:** Moderate risk impact - **Risk likelihood:** High risk likelihood ### Analysis details - Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern. - This extension was recently updated in the past month. New updates may not be stable or safe. > Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing). ## Similar extensions and apps - [JavaScript Playground ⚡ Online JS Compiler](https://chrome-stats.com/d/javascript-compiler) — 28 users - [HTML Live Editor](https://chrome-stats.com/d/html-live-editor) — 47 users - [Try IT Yourself HTML5 editor](https://chrome-stats.com/d/try-it-html5-editor) — 241 users, 4.14 / 5 - [RunCode - OnlineCompiler](https://chrome-stats.com/d/runcode-onlinecompiler) — 6 users - [HTML & CSS Scriptor](https://chrome-stats.com/d/html_css_scriptor) — 1 users - [Codeforces Lite](https://chrome-stats.com/d/codeforces-lite) — 108 users, 5.00 / 5 - [Pointers](https://chrome-stats.com/d/pointers) — 1 users - [Code Editor](https://chrome-stats.com/d/code-editor) — 612 users, 4.00 / 5 - [MyQuizGPT - AI Quiz Generator](https://chrome-stats.com/d/myquizgpt-ai-quiz-generator) — 3 users - [Notepad++ online](https://chrome-stats.com/d/notepad-plus-online) — 32 users, 3.67 / 5 - [GFG Sarthi](https://chrome-stats.com/d/gfg-sarthi) — 1 users - [HTML Runner](https://chrome-stats.com/d/html-runner) — 61 users, 1.00 / 5 --- Source: [Chrome-Stats](https://chrome-stats.com/d/igcse-pseudocode-editor)