Keyword focus: form filler chrome extension
Form filler chrome extension for QA regression
Run repetitive QA checks faster with one-click realistic form inputs across localhost, staging, and production.
Read the dedicated guide
Chrome Extension for Fast Form TestingSave Your Team 20+ Hours Monthly.
Test Forms with Realistic Mock Data in 1 Click.
Auto-generates realistic test data for dev and QA teams. 100% private. Works everywhere, localhost to production.
✓ Works offline ✓ No credit card required ✓ Works on all websites
Trusted by High-Performing Teams Who Value Their Time
Top teams choose Mock Fill because every minute saved on repetitive tasks is a minute invested in building better products.
Why Developers/QAs Choose Mock Fill
Everything you need to speed up form testing. Nothing you don't.
Instant Autofill in 1 Second
Fill entire forms instantly. No more typing test data repeatedly. Works with any input type.
- ✓One-click fills entire forms
- ✓Keyboard shortcut (Ctrl+Shift+P) support
- ✓Field-by-field precision control
100% Local & Private
All data generation happens locally in your browser. Nothing ever leaves your machine.
- ✓No external API calls
- ✓No data collection or analytics
- ✓Safe for enterprise environments
Smart, Realistic Data
Generates context-aware data. Real names, valid emails, proper phone formats, not gibberish.
- ✓Auto-detects field types
- ✓Realistic names, emails, addresses, phone numbers
- ✓Custom data types(Pro)
Custom Rules in 2 Clicks
Add custom validation rules for business-specific fields. Set exact formats, lengths, or patterns in seconds.
- ✓Click field → Add rule → Save (2 clicks!)
- ✓Set precise lengths (e.g., 9-digit routing numbers)
- ✓Pre-filled values that match your business logic
Zero Setup Required
Install and fill forms instantly. Toggle on/off per site and keep control without bugging engineering.
- ✓Contextual toolbar controls
- ✓Domain allow/deny management
- ✓Instant onboarding for teammates
Team Ready & Shareable
Perfect for QA, design, product, and demo crews who need consistent data without the repetitive typing.
- ✓Sync workflows across teams
- ✓Great for demos and user testing
- ✓Saves ~15 hours per teammate per month
Install now and reclaim your next testing session
Grab Mock Fill before your next bug bash or demo and never retype onboarding flows again.
Works offline · No credit card · Works on all websites
Built for Your Workflow
Whether you're coding, testing, or designing, MockFill saves you time.
👨💻
Developers
Stop wasting 1+ hours every day typing test data. Ship faster without repetitive copy/paste.
- ✓One-click autofill for localhost and staging
- ✓Works with React, Vue, and Angular forms
- ✓Saves ~15 hours per month per engineer
🧪
QA Teams
Run through test cases 3× faster.
- ✓Realistic data for edge-case validation
- ✓No more "test@test.com" in bug reports
- ✓Cross-browser compatible for every suite
🎨
Designers
Preview forms with real-looking data.
- ✓Perfect for design reviews and demos
- ✓Responsive layout testing made easy
- ✓No dev setup required
SEO Use Cases for Form Testing Teams
These blog guides are built for exact search intents like form filler chrome extension, autofill forms chrome extension, and fake data generator chrome extension.
Keyword focus: autofill forms chrome extension
Autofill forms chrome extension for development
Cut setup time in dev loops by instantly filling long onboarding and checkout flows with valid-looking data.
Read the dedicated guideKeyword focus: fake data generator chrome extension
Fake data generator chrome extension for demos
Populate realistic names, emails, phones, and addresses during demos without exposing real customer data.
Read the dedicated guideKeyword focus: fake filler alternative
Fake Filler alternative for modern workflows
Compare MockFill vs Fake Filler for privacy, realistic data quality, and faster team onboarding.
Read the dedicated guideYour future self will thank you
Whether you are squashing bugs, presenting to stakeholders, or polishing UI states, Mock Fill keeps you in flow.
Works offline · No credit card · Works on all websites
Join Devs and QAs who value productivity
5 star rating
"This tool is going to make testing a LOT smoother for developers, QAs and designers."
FV
5 star rating
"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
5 star rating
"Amazing extension. Works as expected."
Rg
Questions? We’ve Got Answers.
Everything you need to know before you install Mock Fill for your team's workflow.
Does Mock Fill work on localhost and staging environments?
Yes. Mock Fill runs entirely inside Chrome, so it works on localhost, staging, password-protected sites, and production environments alike without extra configuration.
Is my data safe when I use Mock Fill?
Absolutely. The extension is 100% local and never sends data anywhere. No analytics, no remote APIs, and no tracking pixels — everything stays in your browser.
Will Mock Fill slow down my browser?
No. The extension is lightweight (under 2 MB) and only activates when you interact with form fields, so it keeps Chrome fast even with dozens of tabs open.
Can I customize the data that gets generated?
Absolutely, using our super simple UX you can easily add custom rules for the fields to generate the data as per your website/product needs