Paste a JSON document
Use standard JSON with double-quoted property names and strings. Comments, trailing commas, and JavaScript expressions are not valid JSON.
Free online JSON formatter and validator
Pretty-print compact JSON, minify a valid document, or locate a syntax error without uploading the input. The formatter runs entirely in this browser.
Format or validate JSON locally
Paste JSON below. Formatting and validation happen on this device.
How to use free online json formatter and validator accurately
This json tool keeps input local, but its result still needs the human review described in the steps below before it is shared or used.
Format, minify, or inspect the error
Formatting adds two-space indentation; minifying removes unnecessary whitespace. Neither action changes values or validates application business rules.
Review sensitive values before sharing
Search headers, tokens, signatures, personal data, internal hosts, and signed URLs. A valid payload can still be unsafe to publish.
What this json tool does not do
This tool validates JSON grammar only. It does not apply JSON Schema, OpenAPI requirements, field-level permissions, payload-size rules, or an application's semantic constraints.
Before sharing the json result, read JSON pastebin guide for the matching context and privacy checks.
Free online JSON formatter and validator questions
Privacy, limits, and correct interpretation.
Does the JSON formatter upload my data?+
No. Parsing and formatting run locally in the browser. Data reaches Pastebin.ai only if you separately create a paste.
Can it validate JSON Schema?+
No. It checks JSON syntax, not required fields, types defined by a schema, or business rules.
Will formatting redact secrets?+
No. Formatting changes whitespace only; inspect and replace sensitive values yourself.
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