Paste JSON to format, validate, minify, and inspect nested objects in a tree view.
JSON problems usually appear when an API response is compressed into one line, a webhook payload contains a deeply nested object, or an AI assistant returns almost-valid JSON with a small syntax issue. Paste the data here to validate it, format it into readable indentation, and review arrays or object keys in the tree view before copying it into your code, REST client, test case, or documentation.
Catch syntax errors before sending request bodies to an API. The formatter identifies invalid JSON and keeps valid values intact while improving readability.
Beautify JSON for debugging and code review, then minify it again when you need a compact value for configuration, samples, or transport.
Use the tree view to scan nested keys and arrays without losing your place in a large payload. This is useful for API logs and generated test data.
Related tools: REST API Client | JWT and Base64 Decoder | Developer Toolkit
