JSON tools
Format, validate, compare and convert JSON. Everything runs in your browser — payloads never leave your machine.
JSON Formatter & ValidatorFormat, validate and minify JSON in your browser. Pinpoints syntax errors by line and column, sorts keys for clean diffs, and never uploads your data.JSON MinifierStrip whitespace from JSON and see the exact byte savings. Parses before minifying, so invalid input is located rather than mangled.JSON to TypeScriptGenerate TypeScript interfaces from a JSON sample, merging every record so differing keys become optional and varying types become unions.JSON Diff & CompareCompare two JSON documents structurally, so reformatting and key order are ignored and only real changes are reported — with a JSON Patch export.JSON Schema ValidatorValidate JSON against a JSON Schema (draft 2020-12) and get every failure located by JSON Pointer, with unsupported keywords listed rather than skipped.JSON to CSV & CSV to JSON ConverterConvert JSON to CSV and CSV to JSON in either direction, with RFC 4180 quoting, delimiter detection, nested-object flattening and type inference you control.JSONPath TesterRun a JSONPath expression against a document and see every matching node with its normalized path — filters, wildcards and recursive descent included.JSON to Zod SchemaGenerate a Zod schema from a JSON sample, with string formats and integers inferred only when every sample agrees. Zod 4 and 3 output.