Mock Fill
Auto-fill forms instantly while testing - save hours of repetitive work
Mock Fill Overview
Mock Fill is a powerful Chrome extension designed to streamline form testing workflows for developers, QA professionals, and designers. It eliminates the tedious process of manually typing test data by injecting smart autofill icons into form inputs. The tool automatically detects input fields across any website, recognizing various data types including emails, phone numbers, names, addresses, and dates. With its context-aware generation, Mock Fill produces realistic test data that helps validate form behavior more effectively than random strings. The extension works seamlessly with modern web technologies including React, Vue, Angular, and plain HTML forms, making it an essential tool for anyone involved in web development or testing.
Mock Fill Screenshot
Mock Fill Official screenshot of the tool interface
Mock Fill Core Features
Smart Input Detection
Automatically identifies and categorizes input fields across any website, including dynamic forms and single-page applications. Recognizes field types like emails, phones, names, addresses, and dates to generate appropriate test data.
One-Click Autofill
Offers three filling modes: Individual Fill (click icon next to any field), Bulk Fill (fill entire form at once), and Context-Aware generation that produces realistic data matching the field type and expected format.
Developer-Focused Features
Includes toggle functionality for quick enable/disable, generates believable test data (not random strings), and works seamlessly with all major frameworks including React, Vue, Angular, and plain HTML.
Seamless Integration
Features non-intrusive, minimal icons that blend with website designs. Provides visual feedback on successful fills and works responsively across desktop and mobile interfaces.
Privacy & Security
Operates with zero tracking - no data collection. All generation happens locally in your browser with no external requests, making it fully functional offline and ensuring complete data privacy.
Cross-Browser Support
Built with modern web technologies including Manifest V3, TypeScript for robust development, and React UI for the popup interface. Features persistent settings and real-time input detection.
Mock Fill Use Cases
Developer Testing
Developers can instantly test registration/login flows, validate form validation logic, and debug submissions without retyping data, significantly accelerating development cycles.
QA Testing
QA teams can efficiently test edge cases, validate form behavior across multiple scenarios, and automate repetitive test flows with consistent, realistic test data.
Design Validation
Designers can preview layouts with real-looking data, test different input lengths, and validate responsive form behavior across various screen sizes.
How to Use Mock Fill
Install the Mock Fill extension from the Chrome Web Store - no account or setup required.
Navigate to any website with form inputs - the extension works automatically on all sites by default.
Click the Mock Fill icon in your browser toolbar to access settings and manage allowed websites.
Use individual fill icons that appear next to each input field or click 'Bulk Fill' to populate the entire form at once.
Toggle the extension on/off as needed through the browser toolbar icon for complete control over when it operates.