Does this tool fix invalid JSON automatically?

No. It reports syntax errors with line and column numbers so you can fix them manually. This prevents silently corrupting your data.

Is there a file size limit?

There is no hard limit, but very large files (10MB+) may slow your browser. For huge payloads, consider a CLI tool like jq.

Standard JSON does not support comments. JSONC (JSON with comments) is not supported — strip comments before formatting.

No. All processing happens in your browser. Zovaty never receives or stores your JSON.

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JSON Formatter — Beautify, Minify & Validate JSON Online | Zovaty