# SupaFill: free extension to auto-fill forms with realistic fake data **URL:** \ **Category:** Web Testing\ **Tags:** tips-tricks, web-testing, integrations, tools\ **Created:** [June 25, 2026, 10:41am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097 "2026-06-25T10:41:51Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [June 25, 2026, 10:41am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/1 "2026-06-25T10:41:51Z")
hey all, got tired of typing `test@test.com` and `john doe` into the same forms while doing manual testing, so i built a little browser extension called _ **SupaFill** _ - [https://supafill.github.io/](https://supafill.github.io/) [![](https://europe1.discourse-cdn.com/katalon/original/3X/4/a/4a89a8fcc9a8e8ba23629c870f31d480b61c7c11.jpeg "SupaFill - Fill everything in a snap.") ](https://www.youtube.com/watch?v=Gn8l-DjEvcU) sharing in case it helps you too. free, no account, runs fully offline what it does: one click fills every field on a page with realistic fake data (names, emails, phones, addresses, dropdowns, radios, checkboxes). **why it’s handy for qa:** - consistent personas, so first name + last name + email all match the same fake person - multi person forms (like booker + guests) get a different persona each - 10 locales for localization testing - custom rules + templates like `user+{{random4}}@company.comcompany.com` - ignore fields like captcha/csrf - works in iframes and with react/vue/angular inputs **how to use:** - toolbar icon, or `ctrl+shift+e` to fill / `ctrl+shift+l` to clear - right click to fill a single field or just one form **install:** - chrome/edge/brave: > **[SupaFill - Chrome Web Store](https://chromewebstore.google.com/detail/supafill/gegpejkgmgkomjmjdfobhpnjkoiknjbl)** > > Fill everything in a snap. - firefox: > **[SupaFill – Get this Extension for 🦊 Firefox (en-US)](https://addons.mozilla.org/en-US/firefox/addon/supafill/)** > > Download SupaFill for Firefox. Fill everything in a snap. everything is generated locally, no tracking or analytics would love feedback on what flows you’d want supported. thanks! ---
**Author:** ![cdare](https://avatars.discourse-cdn.com/v4/letter/c/f1d935/32.png) [@cdare](https://forum.katalon.com/u/cdare)\ **Post date:** [June 25, 2026, 11:09am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/2 "2026-06-25T11:09:21Z")
seems promising ---
**Author:** ![frodriguez1](https://avatars.discourse-cdn.com/v4/letter/f/41988e/32.png) [@frodriguez1](https://forum.katalon.com/u/frodriguez1)\ **Post date:** [June 25, 2026, 11:10am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/3 "2026-06-25T11:10:29Z")
custom rules is something missing in mostly extensions. that will be a great feature ---
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [June 25, 2026, 11:16am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/4 "2026-06-25T11:16:19Z")
> [@cdare](#): > > seems promising thanks @cdare give it a try and let me know what you think ---
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [June 25, 2026, 11:17am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/5 "2026-06-25T11:17:17Z")
> [@frodriguez1](#): > > custom rules is something missing in mostly extensions. that will be a great feature yeah exactly, that was the main itch for me too you can match a field by `name/id/class/placeholder/label` and either pick a generator or set a custom value, even templates like `user+{{random4}}@company.com` would love to hear what kinds of rules you’d want ---
**Author:** ![dineshh](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/dineshh/32/24488_2.png) [@dineshh](https://forum.katalon.com/u/dineshh)\ **Post date:** [June 26, 2026, 2:46am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/6 "2026-06-26T02:46:19Z")
looks good ---
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [June 26, 2026, 3:19am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/7 "2026-06-26T03:19:44Z")
> [@dineshh](#): > > looks good thanks @dineshh give it a try 😁 ---
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [July 7, 2026, 3:41am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/8 "2026-07-07T03:41:13Z")
have you tried this extension, guys @cdare @frodriguez1 @dineshh ? 😁 ---
**Author:** ![dineshh](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/dineshh/32/24488_2.png) [@dineshh](https://forum.katalon.com/u/dineshh)\ **Post date:** [July 7, 2026, 7:03am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/9 "2026-07-07T07:03:52Z")
not yet.. will squeeze in some time and let you know @depapp ---
**Author:** ![depapp](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/depapp/32/29178_2.png) [@depapp](https://forum.katalon.com/u/depapp)\ **Post date:** [July 7, 2026, 8:58am UTC](https://forum.katalon.com/t/supafill-free-extension-to-auto-fill-forms-with-realistic-fake-data/192097/10 "2026-07-07T08:58:42Z")
> [@dineshh](#): > > not yet.. will squeeze in some time and let you know @depapp thanks @dineshh