Does this accept JSON5 or comments?
No. The formatter accepts strict JSON only.
Ready to Use
JSON Validator & Formatter
Paste strict JSON to validate it, pretty-print it, or minify it for compact transport. The tool supports 2- or 4-space indentation, recursive key sorting, and a validation-only mode that confirms the JSON is valid before returning normalized output.
Use this tool
Tool Workspace
File Transform Template
Upload/convert-style experience with deterministic output and download-friendly rendering.
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Result
Paste JSON to validate and format it.
Popular use cases
- Validate and pretty-print an API payload before sharing it with a teammate.
What to expect
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