Mock Fill LogoMock Fill
Mock Fill LogoChrome Extension

Stop wasting time typing. Auto‑fill forms instantly while testing.

A powerful Chrome extension that injects smart autofill icons into form inputs, saving developers, QA, and designers hours of repetitive work.

Zero Setup Required
100% Local & Private
Works on Any Website

Powerful Features for Modern Development

Everything you need to speed up form testing and focus on what matters most - building great products.

🎯 Smart Input Detection
Automatically detects inputs across any website. Recognizes emails, phones, names, addresses, dates, and more. Works with dynamic forms & SPAs.
⚡ One‑Click Autofill
Individual Fill → click icon next to any field. Bulk Fill → fill the entire form at once. Context‑Aware → generates realistic data based on field type.
🛠 Developer‑Focused Features
Toggle on/off anytime. Generates realistic, believable test data (not asdf123). Works with React, Vue, Angular, and plain HTML.
🎨 Seamless Integration
Non‑intrusive, minimal icons. Visual feedback on successful fill. Responsive — works on desktop & mobile.
🔒 Privacy & Security
Zero Tracking — we don't collect any data. 100% Local — all generation happens in your browser. Offline Ready — no external requests.
🚀 Cross‑Browser Support
Built with Manifest V3. TypeScript for robust development. React UI for modern popup. Persistent settings and real‑time detection.

Built for Your Workflow

Whether you're developing, testing, or designing, Forms Autofill adapts to your needs.

👨‍💻
Developers
Test registration/login flows instantly. Validate form validation logic. Debug submissions without retyping.
  • Faster development cycles
  • Focus on building features
  • Instant form testing
🧪
QA Teams
Test edge cases & consistency. Validate across scenarios. Automate repetitive test flows.
  • Comprehensive testing
  • Multiple test scenarios
  • Consistent data validation
🎨
Designers
Preview layouts with real‑looking data. Test different lengths of inputs. Validate responsive form behavior.
  • Realistic design previews
  • Layout validation
  • Responsive testing

Loved by Developers & Testers Worldwide

See what professionals are saying about Mock Fill.

"This tool has great potential. Really clean, and minimalistic design. Would be nice to have some more features, but it's an early product, so most likely it's coming soon."
ZD
Zoltán Domonyi
Chrome Web Store User at Aug 26, 2025
"As a Salesforce Developer, filling up dummy test data in endless forms was my least favourite thing. That problem might finally be over - it auto-fills forms instantly while testing!"
FV
Farida Vakil
Salesforce Developer at ex-Hexaview Technologies

See Mock Fill in Action

Here's what the extension popup looks like when you click the Mock Fill icon in your browser toolbar.

Mock Fill Extension

Mock Fill

Auto-Fill Status

Extension is currently ON

Form icons will appear in input fields

Allowed Websites

Add websites where you want the extension to work. Leave empty to work on all sites.

Extension will work on all websites

Ready to Speed Up Your Form Testing?

Join thousands of developers, QA professionals, and designers who have already transformed their workflow.

✅ No Account Required✅ Works Offline✅ Secure & Private