Ambiakshi ToolsRuns 100% on this deviceStudentsDevelopersDSAPractice coding problems online
Isolated Web Worker JavaScript judge with 3s execution timeout for DSA drills.
Runs 100% in your browser. Nothing you enter or upload ever leaves this device. How this works →
Return indices of two numbers that add to target. function solve(nums, target)
Isolated Web Worker code sandbox
Code execution runs locally inside an isolated background Web Worker with an active 3-second timeout to prevent infinite loops from freezing your browser tab. This sandbox is designed for personal algorithmic drills and campus practice.
Standard: Executes in a client-side Web Worker thread; not an enterprise container proctoring platform.
Frequently asked
Direct answers for search, answer engines, and generative crawlers.
No. Code execution and unit test verification run 100% locally inside your web browser's JavaScript runtime. Your solution code and test results never leave your machine.
Feedback, bugs & custom requests
Found a bug, a math anomaly, or a missing feature on Practice coding problems online? Send it to engineering — reports land in our Discord channel. Optional email if you want a follow-up.
Related tools
Canonical: /developer/codejudge-core. Estimates and conversions are educational. See the full disclaimer.