Test Cards
By Edward Ji
Copy and prefill test card numbers and other payment methods with a single click.
Time on the storeUnder a yearA rough range, not an exact date
Store users25As shown on the Chrome Web Store
Chrome Web Store rating3.5 / 54 ratings on the Chrome Web Store
Last store update29 Jun 2026Version 1.1.3, 3 months ago
How Test Cards is doing
Test Cards has been on the store for less than a year and is in the top half of Developer Tools by users. Recent activity is steady.
- Time on the store
- Under a year
- Recent direction
- Steady
A rough range, not an exact date.
Moving at about the same pace as the month before.
Members see the exact launch date, growth history and every release
Inside the extension
Product image 1 of 3Reviews
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The maker
This is the only listing we know of from Edward Ji.
- Listings
- 1
- Combined store users
- ≈25
- Store Featured
- 0
Combined users can count the same person more than once. Maker profile
Ext Watch AI
Should you build in this niche?
One research report for Test Cards. Reports come with Plus, Pro and Max.
- Takeaway & demandCited takeaway and search volumes
- Traffic & domainPopularity rank, visits and authority
- Money & pricingPlans and prices from the maker’s site
- ReviewsComplaints and praise, quoted
- Competitors & ranksRank against the closest listings
- Build opportunityWhat to build and how to position it
- Every number shows its source and date
- Ready in a minute or two
- Report and PDF yours for 30 days
