JSON and APIs
JSON Formatter and Validator
Format, validate, sort and minify JSON directly in your browser.
Open tool →11 Tools
JSON and APIs
Format, compare, convert and validate API payloads, contracts and responses with practical technical tools.
Inspect API payloads and responses during development and testing.Prepare examples for Postman, RestAssured, mocks and documentation.Find contract, type or content differences faster.
JSON and APIs
JSON Compare Tool
Compare two JSON documents and find differences by path, type and value.
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JSON to CSV Converter
Convert JSON arrays to CSV and CSV files back to JSON.
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JWT Decoder
Decode JWT headers and payloads without sending the token to a server.
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cURL Request Builder
Build cURL commands with method, headers, query parameters and request body.
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HTTP Status Code Reference
Look up HTTP status codes, meanings and common API use cases.
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JSON Path Lookup
Read values using dot notation and array indexes.
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JSON to YAML Converter
Convert objects between JSON and YAML directly in your browser.
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JSON Schema Validator
Validate JSON against type, required-field, enum and range rules.
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JSON Schema Generator
Create a starter JSON Schema from a JSON example.
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OpenAPI and Swagger Validator
Analyze OpenAPI documents in JSON or YAML and check essential structure.
Open tool →How to choose the right tool
Start with the result you need, use fictional data whenever possible and review output before applying it to a real system. These related pages are organized so you can move from preparation to execution and validation without switching between many platforms.
Privacy and performance
The portal prioritizes in-browser processing. Tools that handle large files may use significant memory, so test with a copy and keep the original file safe.