Does this JSON formatter upload my data?

No. Parsing, validation, and minify/beautify all run in the tab. There is no server round-trip for the payload.

Can I format JSON with comments or trailing commas?

Use it for standard JSON first. If a document is invalid, the validator reports the parse error in-page so you can fix it locally.

When should I use JSON Diff instead?

When two payloads should match and do not. Format each side here, then compare in JSON Diff without uploading either file.

Why this tool stays in the browser

This JSON formatter runs entirely in your browser. Paste a payload, validate it, beautify or minify it, and copy the result — the string never leaves the device. That is the point of this sandbox: inspect production-shaped JSON without handing a vendor your tokens, PII, or customer records. Pair it with JSON diff when two documents disagree, or convert to YAML when a config file is the next step.

Related: JSON Diff · YAML ↔ JSON

FAQ

Does this JSON formatter upload my data?: No. Parsing, validation, and minify/beautify all run in the tab. There is no server round-trip for the payload.
Can I format JSON with comments or trailing commas?: Use it for standard JSON first. If a document is invalid, the validator reports the parse error in-page so you can fix it locally.
When should I use JSON Diff instead?: When two payloads should match and do not. Format each side here, then compare in JSON Diff without uploading either file.

JSON Formatter & Validator

Format, validate, and minify JSON strings securely in your browser.

Input JSON

Indent:

Output

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