@nap.codes vs JSONLint
JSONLint has been the go-to online JSON validator forever. The catch: your JSON is sent to their server for parsing. If your payload has API keys, JWT tokens, PII, or internal API responses, that's a leak. /json/ uses the browser's native JSON.parse — same validation, zero network traffic, and adds a tree view, key-sort, and JSONPath integration.
Side-by-side
| Feature | @nap.codes | JSONLint |
|---|---|---|
| Where parsing happens | Your browser (native JSON.parse) | JSONLint server |
| Payload uploaded | No | Yes |
| Ads on the page | No | Yes |
| Error location (line + col) | ✓ | ✓ |
| Tree view | ✓ | Basic |
| Sort keys recursively | ✓ | No |
| JSONPath query | → /jsonpath/ | No |
| Diff two JSONs | → /diff/ | No |
| Copy dot-path to any node | ✓ | No |
| Signup required | No | No |
| Rate limit | None | Ambiguous |
When to pick us
Pick /json/ when the payload has anything sensitive — API responses from staging, JWT-embedded claims, customer data. Also when you want the tree view, sort-keys, or the one-click path into /jsonpath/ for querying.
When to pick JSONLint
Pick JSONLint when you specifically want the exact JSONLint validation error message format your team is used to. Otherwise there's no reason: same validation, ours is faster (no round-trip) and doesn't leak your JSON.