JSON Formatter & Validator
Pretty-print, minify and validate JSON — with clear error messages when something is malformed.
JSON Tools
Format · validate · path finder · JSON Schema · JSONPath · Convert · Diff · jq
Supports:
$ · .name · [n] · [*] · ..name · ['key']Shares input with the Validate / Path / Schema / Diff tabs — pasted JSON carries over automatically. Auto-detects format on paste. Libraries loaded on first use.
Powered by jq-web (WASM, ~400 KB). Runs against the shared JSON editor above. Live results debounced 250 ms.
About this tool
Paste raw JSON to format it with consistent indentation, collapse it to a single minified line, or validate it. When the JSON is malformed, the tool reports what is wrong and where, so you can fix it quickly.
Parsing happens entirely in your browser, so even large API payloads stay private and are processed instantly. It is useful for reading minified API responses, tidying up config files and checking that generated JSON is well-formed.