JSON Tools
Free online JSON tools: format, validate, compare, repair, query and convert JSON. Everything runs locally in your browser — payloads never leave your device.
JSON Formatter
Format, validate and minify JSON online. Find syntax errors with exact positions, switch between text and tree views, and process JSON directly in your browser.
JSON Viewer
View and explore JSON as a collapsible tree online for free. Navigate nested objects and arrays with syntax highlighting — private in your browser.
JSON Compare
Compare two JSON documents online. Find added, removed and changed values with exact JSON paths using this free online JSON diff tool.
JSON Repair
Fix broken JSON online for free. Repairs comments, single quotes, unquoted keys, trailing commas and JS/Python literals automatically.
JSON Escape & Unescape
Escape and unescape JSON strings online for free. Convert text to a valid JSON string literal and back — runs in your browser.
JSONPath Tester
Test JSONPath expressions online for free. Run queries against your JSON, see live match counts and flattened results — powered by jsonpath-plus.
JSON Converter
Convert JSON to YAML, CSV or XML online for free. Fast, privacy-friendly conversion that runs entirely in your browser — no upload required.
JSON to JSON Schema
Generate a JSON Schema (draft 2020-12) from example JSON online for free. Types, required fields and nesting inferred automatically.
JSON to Code
Generate TypeScript, JavaScript, Java, Python, Go and C# classes from JSON online for free. Type-safe model generation in your browser.
JSON to TypeScript
Convert JSON to TypeScript interfaces online — nested objects become named interfaces, optional fields detected across arrays. Free, no upload.
JSON to Zod Schema
Generate Zod schemas from JSON online — nested objects become named z.object() schemas with .nullish() optionals and a z.infer type export. Free, no upload.
JSON Schema to Code
Generate type models from a JSON Schema online — TypeScript interfaces, Java records, Python dataclasses, Go, Rust and more. $ref, allOf and required handled.
JSON Flatten & Unflatten
Flatten nested JSON to dot/bracket keys online — or unflatten flat keys back to nested objects and arrays. Custom separators, lossless round-trip, no upload.
OpenAPI & Swagger Validator
Validate OpenAPI 3.x and Swagger 2.0 specifications in JSON or YAML. Check structure, references, endpoints and schema definitions online.