JSON to GraphQL Schema Converter Online - Free Tool

JSON to GraphQL Schema Converter

Generate GraphQL type definitions and queries from JSON data

Conversion Settings

Root Type Name:

Make fields nullable

Generate query example

Input JSON

GraphQL Schema Output

About JSON to GraphQL Conversion

GraphQL is a query language for APIs that provides a complete description of the data in your API. This tool generates GraphQL type definitions from JSON data.

Type System: Converts JSON types to GraphQL scalar types (String, Int, Float, Boolean)
Nested Objects: Automatically creates custom types for nested objects
Arrays: Converts arrays to GraphQL list types [Type]
Nullability: Optional fields are marked with ! for required fields
Query Generation: Creates example queries based on the schema

Supported JSON Types:

String → String
Number (integer) → Int
Number (float) → Float
Boolean → Boolean
Array → [Type]
Object → Custom Type
null → Nullable field

Encoding and Data Utilities

Encode, decode, measure sizes, and transform common formats.

Hex Encoder/Decoder Convert text to and from hexadecimal HTML Encoder Escape markup safely HTML Decoder Unescape HTML entities GZIP Compressor Compress text using GZIP algorithm GZIP Decompressor Decompress GZIP encoded data Text to Deflate Compress text using Deflate algorithm Deflate to Text Decompress Deflate data to plaintext Java Escape Escape text for Java string literals Java Unescape Convert escaped Java text to plain text SHA384 Hash Generate SHA-384 hash from text SHA384 File Hash Generate SHA-384 hash from file SHA512 Hash Generate SHA-512 hash from text SHA512 File Hash Generate SHA-512 hash from file SHA512/224 Hash Generate SHA-512/224 hash from text SHA512/224 File Hash Generate SHA-512/224 hash from file SHA512/256 Hash Generate SHA-512/256 hash from text SHA512/256 File Hash Generate SHA-512/256 hash from file SHA1 Hash Generate SHA-1 hash from text SHA1 File Hash Generate SHA-1 hash from file SHA224 Hash Generate SHA-224 hash from text SHA224 File Hash Generate SHA-224 hash from file SHA256 Hash Generate SHA-256 hash from text SHA256 File Hash Generate SHA-256 hash from file Double SHA256 Hash SHA256(SHA256(x)) - Bitcoin hash SHA3-224 Hash Generate SHA3-224 Keccak hash SHA3-224 File Hash Generate SHA3-224 hash from file SHA3-256 Hash Generate SHA3-256 Keccak hash SHA3-256 File Hash Generate SHA3-256 hash from file SHA3-384 Hash Generate SHA3-384 Keccak hash SHA3-384 File Hash Generate SHA3-384 hash from file SHA3-512 Hash Generate SHA3-512 Keccak hash SHA3-512 File Hash Generate SHA3-512 hash from file Keccak-224 Hash Original Keccak-224 hash algorithm Keccak-224 File Hash Generate Keccak-224 hash from file Keccak-256 Hash Original Keccak-256 (Ethereum hash) Keccak-256 File Hash Generate Keccak-256 hash from file Keccak-384 Hash Original Keccak-384 hash algorithm Keccak-384 File Hash Generate Keccak-384 hash from file Keccak-512 Hash Original Keccak-512 hash algorithm Keccak-512 File Hash Generate Keccak-512 hash from file RIPEMD-128 Hash Generate RIPEMD-128 hash from text RIPEMD-128 File Hash Generate RIPEMD-128 hash from file RIPEMD-160 Hash Generate RIPEMD-160 hash from text RIPEMD-160 File Hash Generate RIPEMD-160 hash from file RIPEMD-256 Hash Generate RIPEMD-256 hash from text RIPEMD-256 File Hash Generate RIPEMD-256 hash from file RIPEMD-320 Hash Generate RIPEMD-320 hash from text RIPEMD-320 File Hash Generate RIPEMD-320 hash from file Grok Pattern Builder Author and debug Logstash grok rules JSONPath Evaluator Test JSONPath expressions and normalized paths XML <-> JSON Two-way XML and JSON conversion JSON to GeoJSON Convert JSON to GeoJSON geographic format JSON to GraphQL Generate GraphQL schema from JSON data Java Decompiler View Java classes on the fly JSON -> Java POJO Generate getters/setters from JSON Text Size (Bytes) Measure string length with/without spaces JSON Size (Bytes) Check JSON payload footprint XML Size (Bytes) Measure XML size quickly UTF-8 Encoder/Decoder Round-trip text and UTF-8 bytes JSON -> NDJSON Convert collections to newline-delimited JSON Cron Generator Craft and copy cron expressions JSON -> YAML Convert JSON documents to YAML YAML -> JSON Transform YAML into JSON YAML -> POJO Generate Java models from YAML Regex Generator Compose regex patterns visually Regex Tester Debug expressions against sample text XML -> POJO Convert XML into Java classes Bash -> Batch Translate shell scripts to Windows .bat JSON -> TypeScript Generate TS interfaces from JSON