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JSON Formatter & Validator

Paste JSON below to beautify, minify, or validate it. Nothing is uploaded — everything runs in your browser.

Processed 100% locally in your browser

Formats automatically as you type. Tip: press Ctrl+Enter (Cmd+Enter on Mac) to format immediately.

Compare two JSON blobs

Paste two versions of a JSON document to see exactly what changed between them.

How this worksRelated tool: Base64 Encoder / Decoder