GraphQL Variables Formatter — Query Validator
Format and validate GraphQL query variables JSON for use in queries and API clients. Paste your variables JSON alongside a GraphQL query to instantly format the JSON, validate that each variable matches its declared type, catch missing required variables, and highlight undeclared extras.
How to Use GraphQL Variables Formatter — Query Validator
How to Use the GraphQL Variables Formatter
Step 1: Paste Your Variables JSON
In the Variables JSON field, paste the JSON object you plan to send as variables with your GraphQL request. The tool formats it instantly with proper indentation.
Step 2: Paste Your GraphQL Query (Optional)
In the GraphQL Query field, paste the full query or mutation including its variable definitions (e.g., query GetUser($id: ID!, $limit: Int)). This enables type validation.
Step 3: Review the Results
The Formatted JSON panel shows your variables with clean 2-space indentation, ready to copy into any API client.
The Validation Results panel checks:
- ✅ Each variable matches its declared GraphQL type (String, Int, Float, Boolean, ID, lists)
- ❌ Required variables (marked with
!) that are missing - ⚠️ Optional variables that were not provided
- ❌ Variables present in the JSON but not declared in the query
Step 4: Copy Formatted JSON
Click Copy to copy the formatted JSON to your clipboard and paste it into your API client, Postman, Apollo Studio, or code.
Supported Types
- Scalar types:
String,ID,Int,Float,Boolean - Non-null:
Type!— validated as required - List types:
[Type]and[Type!]— validated as arrays with item type checking - Custom/enum types: accepted without type-level validation
Frequently Asked Questions
Most Viewed Tools
Screen Size Converter — Diagonal Dimension Tool
Calculate screen width and height from diagonal size and aspect ratio. Convert between inches and centimeters for displays, TVs, and monitors with instant dimension calculations.
Use Tool →DPI Calculator — Print Resolution Tool
Calculate DPI (dots per inch), image dimensions, and print sizes. Convert between pixels and physical dimensions for printing and displays.
Use Tool →Seconds to Time Converter — HH:MM:SS Formatter
Convert seconds to HH:MM:SS time format instantly with precise calculations and easy-to-read formatting.
Use Tool →TOTP Code Generator — 2FA Testing Tool
Generate time-based one-time passwords from a TOTP secret key. Enter your base32 secret, choose a period and digit length, and get the current and next codes with a live countdown timer. Useful for testing and debugging 2FA integrations.
Use Tool →Password Entropy Calculator — Crack Time Estimator
Calculate the information-theoretic bit entropy of any password or API key. Detects character set pools automatically, shows the total number of possible combinations, and estimates crack time across five attack scenarios from rate-limited web logins to GPU cracking clusters.
Use Tool →JSONL Formatter — Line-by-Line Validator
Format, validate, and inspect JSON Lines (JSONL) and NDJSON files. Validates each line individually, reports parse errors by line number, outputs compact JSONL or a pretty-print preview, and lets you download the cleaned file.
Use Tool →JSON to Zod — Schema Generator
Generate Zod validation schema code from a JSON sample object. Infers z.string(), z.number(), z.boolean(), z.array(), z.object(), and z.null() types automatically. Handles nested objects, arrays of objects with optional field detection, and outputs copy-ready TypeScript with import and z.infer type alias.
Use Tool →TLS Cipher Suite Checker — Strength Analyzer
Check TLS protocol version compatibility and cipher suite strength ratings against current best practices. Supports IANA and OpenSSL cipher names — rates each suite as Strong, Weak, or Deprecated and explains why.
Use Tool →Related API & Backend Tools
CORS Header Generator — Cross-Origin Config Tool
Build CORS configuration headers interactively for web servers and APIs. Set allowed origins, methods, request headers, credentials, and preflight cache duration — then copy the generated Access-Control headers or ready-to-paste code snippets for nginx, Express.js, Flask, and .NET.
Use Tool →API Gateway Rate Limiting Calculator — Model RPS, Burst, and Token Buckets
Calculate token bucket size and refill rate from RPS targets for API gateway throttling. Enter your steady-state requests per second, burst multiplier, and average response time — the calculator outputs the bucket capacity, refill rate, per-minute and per-hour quotas, and concurrent connection estimate. Generates ready-to-paste throttling config for AWS API Gateway, Kong, and Nginx. Free and runs entirely in your browser.
Use Tool →API Latency Budget Calculator — Plan Distributed System Performance
Set a P99 SLO latency target and distribute the budget across your upstream service dependencies. See remaining headroom, utilization percentage, a stacked allocation bar, and a per-service breakdown with optional P99 actual measurements.
Use Tool →GraphQL Subscription Builder — Generate WebSocket Payloads and Client Queries
Build GraphQL subscription query strings and generate WebSocket connection code snippets for Apollo Client, urql, and graphql-ws. Define your operation name, variables, and selection fields visually, then copy the ready-to-use code.
Use Tool →GraphQL Cost Estimator — Analyze Query Complexity and Depth
Assign custom field weights to a GraphQL schema and calculate the total query complexity score. Paste any GraphQL query, configure per-field costs, and get a per-field breakdown table showing depth, multipliers, and cumulative cost.
Use Tool →OAuth Token Validator — JWT & OIDC Decoder
Validate and inspect OAuth tokens in your browser. Decode JWT access tokens and ID tokens to view claims, scopes, and expiry. Analyse opaque tokens for entropy and format. Free and private.
Use Tool →Postman to OpenAPI Converter — Spec Migration Tool
Convert Postman Collection v2.1 JSON to OpenAPI 3.0 specification format. Upload or paste your collection, and get a downloadable openapi.yaml or openapi.json with mapped paths, parameters, request bodies, and example responses.
Use Tool →OAuth PKCE Generator — Create Secure Code Verifiers and Challenges
Generate RFC 7636 PKCE code verifier and challenge pairs for OAuth 2.0 authorization code flow. Choose verifier length, get the SHA-256 code challenge, and see exactly where each value goes in the auth URL and token exchange request.
Use Tool →Share Your Feedback
Help us improve this tool by sharing your experience