Free
$0
The Chrome extension, for filling forms with realistic test data.
- Fill web forms in one click
- Realistic names, emails, addresses and more
Fill any web form with realistic test data in one click
PromptFill is a free Chrome extension for developers and QA testers. It fills the form in front of you with names, emails and addresses that look real, so you can get back to testing what happens after you press submit.
Free to use. Pro, with AI fill and an MCP server, is coming soon.
Press Fill form to try it.
Test data that looks like a person typed it
Most test accounts are called “asdf asdf” and live at “test street 1”. That is quick to type, but it hides the bugs real customers find: the long surname that breaks a layout, the postal code with a letter in it, the phone number with a country prefix.
PromptFill fills each field with a value that fits it. A name field gets a name, an email field gets an email address, and the address lines up with the city and country beside it. One click fills the whole form, and the next click gives you a different person.
- Works on the forms you are building and testing
- A different realistic record every time you fill
- Free Chrome extension, installed in a few seconds
AI fill for the fields random data gets wrong
Some fields only make sense in context. A bug report needs steps that match its title. A support ticket needs a message about the product on the page. Random text passes validation, but it makes every test record look the same.
With Pro, PromptFill uses AI to read the form and write answers that belong together, so the data you test with reads like something a real user would send.
Report a bug
TitleDiscount code is applied twice at checkout
Steps to reproduce1. Add any item to the basket.
2. Enter the code SPRING10 and press Apply.
3. Go back one step, then return to checkout.
2. Enter the code SPRING10 and press Apply.
3. Go back one step, then return to checkout.
What did you expect?The 10% discount should be taken off once, not twice.
An MCP server so Claude or Cursor can fill forms for you
Pro includes an MCP server that connects your AI assistant to the PromptFill extension. Ask the assistant to fill a form, and it fills it in your own browser, on the page you already have open.
- Install the extension. Add PromptFill to Chrome from the Chrome Web Store.
- Connect your assistant. Add the PromptFill MCP server to Claude, Cursor or another MCP client.
- Ask it to fill the form. Describe the data you want in plain language.
You
Fill the signup form on localhost:3000 with a customer from Germany. Don’t submit it.
Assistant
Used PromptFill
Done. I filled 8 fields for Lena Hoffmann at Nordwerk GmbH, with a Berlin address and a +49 phone number. The form has not been submitted.
Pricing
The extension is free. Pro pricing is coming soon.
Pro
Coming soon
Everything in Free, plus AI and your assistant.
- AI-powered form filling
- MCP server for Claude, Cursor and other AI assistants
Questions and answers
What is PromptFill?
PromptFill is a form filler for developers and QA testers. The free Chrome extension fills web forms with realistic test data in one click, so you can stop typing the same made-up names and addresses every time you test a form.
Is the Chrome extension free?
Yes. Filling forms with realistic test data is free. Install the extension from the Chrome Web Store and start using it straight away.
What does the Pro plan add?
Pro adds two things: AI-powered form filling, and an MCP server that lets AI assistants such as Claude or Cursor fill forms in your browser.
What is the MCP server for?
MCP (Model Context Protocol) is the standard AI assistants use to work with outside tools. PromptFill's MCP server connects your assistant to the extension, so you can ask Claude or Cursor to fill a form and it happens in your own browser.
How much does Pro cost?
Pro pricing is coming soon. The Chrome extension that fills forms with realistic test data is free.
Who is PromptFill for?
Anyone who fills the same forms over and over while building or testing a web app: frontend and full-stack developers, QA testers, and people running demos.