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File Upload JSON Validator

JSON file upload block for React and Next.js with syntax validation, formatted preview, key count, nesting depth, copy and download prettified output using shadcn/ui and Tailwind CSS

Upload a JSON file and instantly validate its syntax with this React and Next.js block. Displays a valid or invalid status indicator, a formatted JSON preview in monospace font, total key count, maximum nesting depth, and quick actions to copy or download the prettified output. Built with TypeScript, shadcn/ui Button and Badge components, and Tailwind CSS for API debugging, config validation, and data inspection workflows.

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Last updated on March 24, 2026

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