Validatore JSON
Verifica se un JSON è valido.
Paste JSON to check whether it is valid. Errors show the message plus the line and column where parsing failed. Everything runs locally in your browser.
Il tuo input è elaborato localmente nel browser — nulla viene caricato, memorizzato o registrato.
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Come funziona
- 1 Paste or type your JSON.
- 2 The result updates live — valid or the error location.
- 3 Fix the reported line and column if needed.
Casi d'uso comuni
- Catch a stray comma or missing bracket.
- Validate an API response.
- Check config files before deploying.
- Confirm JSON before importing it.
Domande frequenti
Is my input sent to a server?
No. Everything runs locally in your browser — your input is never uploaded, stored or logged.
Does it show where the error is?
Yes — when the browser reports a position, the tool converts it to a line and column number.
What counts as valid?
Strict JSON: double-quoted keys, no trailing commas, no comments.
Is it really free?
Yes — free, with no signup and no limits.