FixtureFill

Same seed reproduces the same QA test data. Normal, Edge and Invalid modes. Local-only and privacy-first. By Kynastro.

FixtureFill is a deterministic form filler built for developers and QA engineers who need repeatable test data for web form testing. Use the same seed with the same mode and form structure to reproduce the same synthetic test data across repeated runs, making bugs and validation scenarios easier to reproduce. Key features • Deterministic test data — Same seed = same data. Recreate the same test scenario whenever you need it. • Normal mode — Generate realistic synthetic values for routine form testing. • Edge mode — Test unusual but valid values and boundary-style input cases. • Invalid mode — Generate intentionally invalid or missing values to exercise validation behavior. • Local-only — FixtureFill runs locally in your browser. No account, telemetry, external AI API, or network service is required. • QA-focused safety — Password fields are not read or filled, forms are never submitted automatically, and disabled or read-only fields are skipped. FixtureFill works with common visible, editable form controls on the active page and dispatches standard input/change events so web applications can recognize generated values. Known limitations Shadow DOM, iframes, and custom form components are not currently supported. In Invalid mode, radio groups that cannot be safely cleared are preserved and reported as skipped rather than forcing an inconsistent state. Web pages may react to input/change events and perform their own autosave behavior. FixtureFill is designed for development, staging, QA, and other environments where you are authorized to test forms.