# Free LeetCode TC Analyzer

> Better solution to LeetCode's default time complexity analyzer which only runs once per day in free version. You can use this extension as much as you want, and the time complexity, and other insights are true almost all the time!

Canonical page: [https://chrome-stats.com/d/free-leetcode-tc-analyzer](https://chrome-stats.com/d/free-leetcode-tc-analyzer)

## Overview

- **ID:** `free-leetcode-tc-analyzer`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Swan
- **Category:** other
- **Daily users:** 1
- **Weekly downloads:** 1
- **Version:** 1.1
- **Last updated:** 2026-06-12
- **First published:** 2026-06-09
- **Size:** 4.61 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/free-leetcode-tc-analyzer/)

## Description

Free LeetCode Complexity Analyzer is a browser extension that analyzes the time and space complexity of your LeetCode solutions directly inside the LeetCode editor.

The extension extracts your code, problem description, and constraints, then uses an AI-powered analysis engine to:

• Calculate time and space complexity (Big-O notation)
• Break down the cost of individual code sections
• Estimate worst-case performance under maximum constraints
• Detect whether the current approach is optimal
• Compare your solution with the optimal approach
• Provide optimization suggestions and complexity insights

Users can securely connect their own Mistral API key through the built-in settings page. No account registration is required.

Designed for competitive programmers, coding interview preparation, and algorithm learning, the extension helps users understand not just whether a solution works, but how efficiently it works.

## Rankings

- #98,912 — Overall
- #60 — leetcode
- #131 — analyzer
- #167 — analyze
- #172 — programmer

## Permissions and access

### Permissions

- `activeTab`
- `storage`
- `tabs`

### Host permissions

- `https://api.mistral.ai/*`

### Content script matches

- `leetcode.com`

## 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 has low user count. Unpopular extensions 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).

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Source: [Chrome-Stats](https://chrome-stats.com/d/free-leetcode-tc-analyzer)