FillKit

FillKit fills web forms with realistic test data in one click. It reads page structure, labels, and field attributes to detect what each input expects — then generates appropriate values automatically. A checkout form gets a valid card number with matching expiry and billing address. A signup form gets a real-looking name, email, and strong password. It recognizes 150+ field types across 50+ locales. Key features: - Valid and invalid modes — generate correct data or intentionally broken values for edge-case testing - Keyboard shortcuts for instant filling (Ctrl+Shift+K fills all forms) - Customizable — override specific fields, set default email domains, choose your locale - Draggable widget or inline per-field filling mode - Works entirely offline — no data leaves your browser Built for developers, QA engineers, and demo environments. All generated data is synthetic. Open source under the MIT license: https://github.com/fillkit/in-browser & it sdk https://github.com/fillkit/sdk