Mock Fill
I got tired of typing the same names, emails, and phone numbers again and again while building/testing forms — usually ending up with gibberish. So I built MockFill, a Chrome extension that auto-detects input fields and lets you autofill realistic mock data in one click (single field or entire form). It’s free, works locally, and doesn’t collect any data. Would love feedback from the HN community
Mock Fill launched on August 27, 2025 with 13 votes, #983 of 8,530 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Tired of typing the same data again & again? Mock Fill is a Chrome extension that auto-detects inputs and lets you fill single fields or entire forms with realistic test data — all in one click. Saves devs & QA hours during testing.
MockFill is a Chrome form filler that autofills forms with realistic test data in one click. Built for QA, developers, and designers. 100% local and private.
Auto-generates realistic test data for dev and QA teams. 100% private. Works everywhere, localhost to production. Top teams choose Mock Fill because every minute saved on repetitive tasks is a minute invested in building better products. Everything you need to speed up form testing. Nothing you don't. Grab Mock Fill before your next bug bash or demo and never retype onboarding flows again. Whether you're coding, testing, or designing, MockFill saves you time. These blog guides are built for exact search intents like form filler chrome extension , autofill forms chrome extension , and fake data generator chrome extension . Run repetitive QA checks faster with one-click realistic form inputs…from mockfill.com
Does a similar job
all alternatives →
Fake Filler2017 · chromewebstore.google.com · ▲137Chrome & Firefox add-on to fill input fields with dummy data
FakerFillOct 2025 · fakerfill.com · ▲6I built a browser extension called FakerFill to help developers and QA testers test web forms faster. It automatically detects input fields and fills them with realistic fake data (names, emails, addresses, etc.). The extension focuses on simplicity — there’s no data collection, and everything runs locally in the browser. You can also create and reuse custom templates, choosing which fields to fill and how they’re populated. Right now, it’s available for Chrome, Edge, and Firefox. I’d love to get feedback from other developers — both on usability and ideas for future improvements.
FillApp2025 · fillapp.ai · ▲14I built a free Chrome extension called FillApp. It lets you fill web forms just by writing plain text like: “Ship it from @NorthDelivery to @WestflowLimited” It parses the form automatically and fills it with the right data, including tricky fields like dates, multiselects, etc. You can also save and reuse snippets across different forms. It’s completely free and works with most modern web forms. Would love to hear what you think.
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