LeetCode Complexity Analyzer

About

Unlock Algorithm Efficiency: LeetCode & NeetCode Complexity Analyzer

Struggling to understand the time and space complexity of your LeetCode and NeetCode solutions?
LeetCode Complexity Analyzer is your essential Chrome extension for mastering algorithm efficiency! This powerful tool automatically analyzes your code submissions, providing instant, insightful feedback directly within your coding environment.

Transform Your Coding Workflow:

Instant, Real-Time Analysis: No more guesswork! As you code, instantly uncover the time and space complexity of your algorithms.

Seamless Integration: Enjoy a user-friendly experience with the "Analyze Code" button elegantly placed near the Submit button on LeetCode and NeetCode.

Deepen Your Understanding: Receive clear, concise explanations alongside the complexity analysis, turning every problem into a learning opportunity.

Multi-Language Support: Works flawlessly with all programming languages supported by LeetCode and NeetCode, ensuring comprehensive coverage.

Boost Your Coding Skills & Interview Prep:

Whether you're honing your skills for technical interviews, aiming for optimal code performance, or simply curious about algorithm efficiency, LeetCode Complexity Analyzer is your indispensable companion for writing better, faster code.

NOTE : Free models keep changing - so please make sure the model mention here is available prior to use. 

Powered by Groq by default [SambaNova models have been deprecated]

Groq API : 

Easy Setup in Seconds:
- Get Your Free API Key: Visit https://console.groq.com/keys to create an account and obtain your API key.
- Install the Extension: Add LeetCode Complexity Analyzer to Chrome.
- Enter Your API Key: Navigate to Chrome Extensions -> LeetCode Complexity Analyzer -> Open Settings.

Set the following: [Updated as of Aug 27 2025]
- API Key: 
gsk....
- API Endpoint: 
https://api.groq.com/openai/v1
- Model: 
openai/gpt-oss-120b 

Click Save 

Refresh your neetcode, leetcode and enjoy coding!

The end points are OpenAI compatible. You can use any models from OpenAI directly, Google, Groq, Cerebras, openRouter etc as long as their instruction following capability is good.

Please feel free to write back if you have any questions / suggestions!