Free online JSON size analyzer — measure JSON structure, nesting depth, and value type distribution instantly in your browser. No data is stored. Shows byte sizes, key counts, and largest entries.
Free online JSON size analyzer — measure JSON structure, nesting depth, and value type distribution instantly in your browser. No data is stored. Shows byte sizes, key counts, and largest entries.
Runs entirely in your browser. No data is sent to our servers.
Get size and structure metrics for a JSON API response
JSON Formatter
Free online JSON formatter — prettify and format JSON with configurable indentation instantly in your browser. No data is stored. Supports 0-8 space indent and optional key sorting.
JSON Validator
Free online JSON validator — check JSON syntax and get detailed error information instantly in your browser. No data is stored. Reports error line/column position and detected JSON type.
JSON Minify
Free online JSON minifier — compress JSON by removing all whitespace and formatting instantly in your browser. No data is stored. Shows original vs minified size and reduction percentage.
JSON Path Query
Free online JSON path query tool — extract values from JSON using dot notation and bracket syntax instantly in your browser. No data is stored. Supports nested objects, arrays, and string keys.