JSON Formatter
Pretty-print, minify, and validate JSON in your browser
Accepted upload: .json · max 5 MB. Other formats are not supported — paste JSON or upload a .json file.
Shortcuts (while this tool is focused): Ctrl/Cmd + Enter format, Ctrl/Cmd + Shift + M minify. Click an error location to jump the caret.
Frequently asked questions
Common questions about the JSON Formatter.
How does JSON Formatter work?
Paste or upload JSON, then Format, Minify, or Validate. ToolsArk parses with JSON.parse and pretty-prints or minifies with JSON.stringify in your browser. Invalid JSON shows a line and column you can jump to.
Does my JSON leave my device?
No. Formatting and validation run entirely in your browser. ToolsArk does not upload your JSON to a server.
What file types can I upload?
Upload a .json file up to 5 MB. Larger or non-JSON files are rejected before parsing.
Does it support JSON5 or schema validation?
No. It expects standard JSON only. There is no JSON5/relaxed syntax mode and no schema or sort-keys feature in this tool.
What keyboard shortcuts are available?
Ctrl/Cmd+Enter formats. Shift+Enter minifies. Click a validation error to move the caret to that location.
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