Wappalyzer vs JSON Formatter
Wappalyzer and JSON Formatter are often considered for the same job. The table below compares their Chrome Web Store ratings, install base, pricing and who each one suits.
Side-by-side comparison
| Wappalyzer | JSON Formatter | |
|---|---|---|
| Rating | 4.6 / 5 | 4.3 / 5 |
| Reviews | 2,000 | 2,100 |
| Users | ~3M+ | ~2M+ |
| Pricing | Freemium · From $149/mo | Free |
| Category | Developer Tools | Developer Tools |
| Developer | Wappalyzer | Callum Locke |
| Last updated | 2026-05-25 | 2026-04-30 |
| Best for | Developers, agencies and sales teams researching what a site is built with. | Anyone poking at REST APIs directly in the browser. |
Final recommendation
Both extensions do a similar job. Start with the one whose pricing and "best for" row above match how you work, and check the permissions each one asks for on its store page before installing.
Frequently asked questions
Can I install Wappalyzer and JSON Formatter at the same time?
Yes, Chrome runs them independently. Keep both only if they do different jobs; if they overlap, pick one, because each active extension adds memory use, page scripts and another set of permissions.
Where do the ratings and install numbers come from?
From each extension's public Chrome Web Store listing. They can lag the live store slightly, and a dash means the figures have not been synced yet.
Keep researching
Alternatives, shortlists and other comparisons in the same category.