JSON Tools
Format, validate, flatten, and convert JSON data directly in your browser. All processing is local for complete privacy. Select a tool below to begin processing your data securely. All tools are 100% private.
JSON Diff Tool
jsonCompare JSON online and highlight differences instantly. Free JSON diff tool to compare two JSON documents side-by-side in your browser — no server uploads, zero data leaks.
JSON Flattener
jsonFlatten nested JSON into a flat JSON structure instantly. Free online JSON flattener that converts complex nested objects to flat JSON or a flat file format — runs entirely in your browser, zero uploads.
JSON Formatter & Validator
jsonFormat JSON, validate structure, and beautify minified output instantly in your browser. Free online JSON formatter with syntax highlighting, error detection, and indent options. Zero uploads, zero server processing.