MockPilot: AI-Powered Form Autofill Browser Extension

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MockPilot is a developer-oriented browser extension that intelligently populates web forms with realistic testing data. It analyzes DOM elements to understand the context of each input field and uses AI to generate relevant mock values. Ideal for developers, testers, and UI designers, MockPilot streamlines the development process and improves testing accuracy by eliminating manual form-filling.

Github Repo

Tech Stack

  • Languages: JavaScript,TypeScript
  • Frameworks/Libraries: React,Tailwind CSS,Vite
  • AI Provider: OpenAI API
  • Build Tools: Chrome Extension APIs

Features

  • AI-powered context-aware form autofill
  • Detects and populates multiple forms on any webpage
  • Supports all common input types: text, email, password, selects, checkboxes, radios, and textareas
  • Analyzes labels, placeholders, and DOM context to generate realistic data
  • One-click fill via floating action button or extension popup
  • Customizable with your own API key and model
  • Secure local-only API key storage

Visuals

Challenges and Solutions

  • Challenge: Understanding the semantics of form fields dynamically on various websites.

    Solution: Implemented DOM analysis logic using JavaScript to interpret field types and context, leveraging label and placeholder cues.

  • Challenge: Integrating AI API while maintaining user privacy and performance.

    Solution: Used the OpenAI API with secure, user-provided keys and performed all logic client-side to avoid data exposure.

Learning Outcomes

  • Deepened experience with Chrome Extension architecture and manifest v3.
  • Gained practical understanding of integrating AI APIs into frontend tools.
  • Improved proficiency in working with complex DOM structures and dynamic websites.