UD5 Toolkit
GraphQL Schema to Markdown Docs - Online Generator
Paste a GraphQL SDL schema and get auto‑generated Markdown documentation. Perfect for API docs. All local.
JSON to GraphQL Schema Converter – Quick Type Defs
JSON to GraphQL Schema Converter
Paste JSON, instantly get GraphQL type definitions
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Input types
Samples:
👤 User Profile
📝 Blog Post
🛒 Products
🧩 Complex Nested
JSON Input
GraphQL Schema
# Paste JSON on the left to generate GraphQL schema
JavaScript Object Diff Viewer - Online Compare Data
Paste two JSON objects and see a highlighted diff showing what was added, removed, or changed. For API testing.
Article Schema Markup Generator - Online JSON‑LD for Blogs
Generate an Article or BlogPosting structured data with headline, author, and image. For rich blog results.
Event Schema Markup Generator - Online JSON‑LD for Concerts
Build a complete Event structured data with performer, location, and dates. Get Google‑ready JSON‑LD for tickets.
GraphQL Request Tester - Online Simple Client
Enter a GraphQL endpoint, write a query, and see the response. Add headers and variables. Simple testing client.
FormData to JSON Converter - Online Debug Multipart
Fill in a form and see the FormData object as JSON. Perfect for debugging multipart form submissions. Client-side.
Local Business Schema Generator - Online JSON‑LD for SEO
Generate a LocalBusiness structured data snippet with name, address, phone, and opening hours. Boost local SEO.
JSON to Excel (.xlsx) Converter - Online Spreadsheet Creator
Paste a JSON array of objects and download a properly formatted .xlsx Excel file. No server; uses SheetJS in the browser.
ICS to JSON Converter - Online Calendar Data Export
Parse an iCalendar file and output the events as a clean JSON array. For developers integrating calendar data. Client‑side only.
JSON List to CSV - Online Flat Array Converter
Convert a JSON array of strings or numbers into a single‑column CSV. Quick data dump. Local.
JSON to Graph Visualization - Online Tree Diagram
Paste a JSON object and see a dynamic, draggable tree graph representation. Excellent for debugging nested data.
JSON to TypeScript Interface - Online Type Gen
Paste a JSON object and instantly get a TypeScript interface definition. Handles nested objects and arrays. Local only.
JSON to Form Data Converter - Online Encode for POST
Convert a JSON object into a url‑encoded form data string or FormData entries. Useful for testing APIs. Local.
JSON to .env Converter - Online Environment File Generator
Transform a flat JSON object into a dotenv file format instantly. Use it to keep your local configuration in sync. All processing is private and client‑side.
Text to Character Array - Online For Programmers
Split a text into an array of individual characters, ready to paste into code. Options for quotes and newlines.
JSON to Go Struct / TypeScript / JSON Schema - Online
Paste a JSON object and quickly generate typed structs for Go, TypeScript interfaces, or a JSON Schema. Perfect for API integration.
Structured Data Testing Tool - Online Validate Rich Results
Paste your JSON‑LD or Microdata and test it against Google's Rich Results criteria. Get warnings. Local linter.
CLI Table Generator - Online JSON to Console Log Style
Paste a JSON array and view it as a formatted console.table() style output. Copy for terminal apps. Local.
Recipe Schema Generator - Online JSON-LD for Food Blogs
Build a recipe rich snippet by filling out ingredients, cook time, and nutrition. Get the valid JSON-LD code.
FAQ Page Schema Generator - Online JSON-LD for Rich Results
Enter your FAQ questions and answers, and get ready‑to‑paste JSON-LD structured data. Boost search appearance.
JSON to SQL INSERT/UPDATE Converter - Online
Parse a JSON array and generate SQL INSERT or UPDATE statements. Perfect for data migration. Client‑side only.
JSON Diff Compare - Online Highlight Differences
Paste two JSON objects and find the structural differences with side‑by‑side highlighted output. Indispensable for API debugging.
GraphQL Query Builder - Online Visual Construct Request
Build a GraphQL query by selecting fields and nesting visually. Copy the built query string. For learning and fast prototyping.
JSON to JSON Schema Generator - Online Infer Structure
Paste a sample JSON object and generate a basic JSON Schema describing its types and required fields. Local inference.
Random JSON Generator - Online Create Sample API Responses
Generate random JSON data with customizable fields (users, products, orders). Useful for frontend mocking. All local.
Structured Data Generator - Online JSON-LD Article & Product
Create JSON-LD structured data snippets for articles, products, and events. Fill in fields and copy the code. SEO helper.
Lottie Animation Previewer - Online JSON Player
Paste Lottie JSON code or upload a .json file and see the animation play. Control speed and loop. Perfect for developers.
GraphQL Playground - Online Query & Schema Explorer
Execute GraphQL queries against any endpoint with variables and headers. Explore schema via introspection. All requests made directly from your browser.
JSON to XML Converter - Online Data Interchange Tool
Seamlessly convert JSON objects into valid XML documents. Control root element naming and attribute formatting. Entirely local, keeping your data safe.
TOML to JSON Converter - Online Config File Translator
Parse TOML configuration files and convert them into JSON. Validate TOML syntax with highlighted errors. No server round-trips, fully browser-based.