Fake Filler is a Firefox extension designed for developers and testers to streamline the process of form testing. This subscription-based tool automatically populates all types of form inputs—textboxes, textareas, radio buttons, dropdowns, and more—with randomly generated fake data. By eliminating the need for manual entry, it significantly speeds up the testing process, allowing users to focus on functionality rather than data entry. The extension also supports the maxlength property and intelligently ignores CAPTCHA, hidden, disabled, and readonly fields, ensuring a seamless experience.

With features such as random selection for radio buttons and checkboxes, as well as the ability to generate dummy data based on regular expressions, Fake Filler is a versatile addition to any developer's toolkit. The Pro version ensures that the user's email is used solely for authentication purposes, with Firebase Firestore employed for settings synchronization, thereby maintaining user privacy while enhancing functionality.