Formdouble: Test Form Filler

Formdouble fills web forms with believable test data in one click, so you can test sign-up, checkout and contact forms without typing.

The data fits together and fits the form:

• One made-up person per fill: the email matches the name, the city matches the postcode, and both email fields and both password fields match
• Respects the form's own rules: pattern, min and max, step, minlength and maxlength, required checkboxes and radio groups
• Emails use reserved test domains (example.com) and websites end in .example, so nothing reaches a real inbox
• Card numbers are the standard public test cards, IBANs pass the bank check digit test
• Works with React, Vue and other frameworks: their state updates as if you typed
• Fills fields inside web components (shadow DOM) and inside frames
• Fills rich-text (contenteditable) areas and ARIA dropdown widgets
• Tells you what it filled and what it skipped, and why

Free:

• Fill the whole page, one form, or one field (toolbar, right-click menu or shortcuts)
• Undo the last 10 fills
• Only fill empty fields, so your own entries stay
• Seed: get the same data every time for repeatable tests
• Skip list: never touch fields that match your selectors
• Highlight what was filled
• US and Dutch data styles
• Dutch test IDs: BSN (passes the 11-proef), KvK number, BTW/VAT number, IBAN with a valid check digit and a real-format postcode
• Custom field types for all sites: fixed values, lists, number ranges (10..99), patterns (re:[A-Z]{3}-\d{4}) and templates

Pro (€10 once at https://digivibetech.gumroad.com/l/formdouble; also with Web Dev Pro (€30 once at https://digivibetech.gumroad.com/l/vbvjjb, web-dev extensions + Valuepad) or Browser Pro (€35 once at https://digivibetech.gumroad.com/l/usaco, all DigiVibeTech browser extensions); one payment, no subscription):

• Four more data styles: Belgian, German, French and British names, addresses, postcodes, phones and VAT numbers
• Site profiles: save data style, seed and fill mode per site, used automatically on that site
• Field rules for one site only
• Auto-fill on sites you choose, every time the page loads
• Export and import your settings

Limits:

• File inputs are skipped (no files are attached).
• Custom dropdowns are filled only when they use standard ARIA roles (combobox with a listbox, or listbox with options). Dropdowns built from plain divs without those roles are skipped and counted.
• Frames from another site are filled only when Formdouble has access to that site; otherwise they are left as they are.
• Closed shadow roots cannot be reached.
• Rich-text editors are filled with plain text; formatting is not generated.

Works in Firefox 128 and later.

Support: https://digivibetech.com/support/ Privacy policy: https://digivibetech.com/privacy/formdouble/