Free Alternative to JSONLint
JSONLint.com validates JSON by sending your data to their server. Irreva's JSON Formatter validates and beautifies JSON using the browser's native JSON.parse — your API responses, tokens, and config files stay completely private.
Why it matters for privacy
Developers commonly paste JWT tokens, API keys, database credentials, and customer data into online JSON validators. Using a browser-based tool means none of that leaves your machine — even if you forget to sanitize the payload first.
Feature comparison
| Feature | Irreva | JSONLint |
|---|---|---|
| JSON validation | Yes (native JSON.parse) | Yes |
| Pretty-print | Yes (2 or 4 spaces) | Yes |
| Minify | Yes | No |
| Error line numbers | Yes | Yes |
| Processing location | Browser only | Server upload |
Frequently Asked Questions
Is JSONLint accurate?
Both tools use the same JSON spec. For validation purposes, results are identical.
Can I use Irreva JSON Formatter offline?
Yes. Once the page is loaded, formatting and validation work without a network connection.