Developer Tools

Visually design load balancer architectures and generate Nginx, HAProxy, and Caddy configuration files.

Validate, format, and minify JSON data instantly.

Compress JSON by removing whitespace and formatting.

Escape and unescape JSON strings for embedding in code.

Parse URL query strings and convert them to JSON objects.

Convert JSON objects to URL-encoded query parameters.

Explore JSON interactively and find JSONPath expressions.

Generate clean HTML5 forms from JSON schema definitions.

Create Tailwind CSS styled forms from JSON schemas.

Generate Bootstrap 5 forms from JSON definitions.

Create complete React form components from JSON.

Extract JSON schema from existing HTML forms.

Build form schemas visually without writing JSON.

Beautify and minify HTML code with syntax highlighting.

Convert Unix timestamps to human-readable dates.

Encode and decode text or files to Base64 format.

Minify or beautify CSS code for production.

Format and beautify SQL queries for readability.

Decode and inspect JSON Web Tokens (JWT) instantly.

Build and validate cron expressions with a visual editor.

Test and debug regular expressions with real-time matching.

Write and preview Markdown with live rendering.

Convert between JSON and YAML formats instantly with syntax validation.

Validate and format YAML files with syntax checking for Kubernetes and DevOps.

Beautify and minify XML documents with syntax validation.

Create beautiful code screenshots with syntax highlighting, themes, and customizable backgrounds.

Convert JSON to TypeScript interfaces or type aliases with customizable options.

Generate Zod validation schemas from JSON data with type inference.

Convert JSON to Go struct definitions with JSON tags and type inference.

Generate Java POJO classes from JSON with Lombok and validation support.

Create Python dataclasses or Pydantic models from JSON data.

Validate JSON data against JSON Schema Draft-07 specifications.

Auto-generate JSON Schema from sample JSON data with customizable options.

Generate realistic fake JSON data with names, emails, addresses, and more.

Compare two JSON objects and highlight differences semantically.

Compare two JSON structures with a git-style unified diff view.

Convert cURL commands to JavaScript, Python, PHP, Go, Ruby, and Node.js code.

Generate realistic fake JSON data with names, emails, addresses, and 40+ field types.

Explore JSON data with an interactive tree view and copy JSONPath expressions.

Free online jq playground to test, filter, and transform JSON data with jq expressions. Real-time results, built-in examples, and cheat sheet.

Validate OpenAPI 3.x and Swagger 2.0 specifications.

Convert Swagger 2.0 specs to OpenAPI 3.0 format.

Validate GraphQL schema definitions for errors.

Generate TypeScript types from GraphQL schemas.

Convert Postman collections to cURL commands.

Convert HAR files to cURL commands for debugging.

Generate API documentation in Markdown or OpenAPI format.

Render JSON specifications as professionally formatted PDF documents in your browser.

Edit JSON visually with drag-and-drop reordering, inline editing, type conversion, and undo/redo.

Calculate Linux/Unix file permissions with visual grid. Convert between numeric (644) and symbolic (rw-r--r--) formats.

Test glob patterns against file lists in real-time. Supports *, **, ?, character classes, and brace expansion.

Search HTML entities and special characters by name or description. Copy entity codes, hex codes, and characters instantly.

Convert between Euler angles, quaternions, and rotation matrices with live 3D preview.

Design entity-relationship diagrams visually. Create database schemas with tables, columns, and relationships.

Design finite state machines with states and transitions. Visualize automata and export state diagrams.

Design and visualize software system architectures with drag-and-drop components. Create diagrams with servers, databases, APIs, message queues, containers, and more.

Create and validate apps.json files for wvw.dev (World Vibe Web). Visual form builder for app store listings.

Create UML diagrams with a live PlantUML editor. Write code and instantly preview sequence, class, activity, state, and component diagrams.

Check if your apps.json is synced with World Vibe Web app store. Compare app listings, detect missing apps, and see next update countdown.

AI-powered ASCII diagram generator. Describe diagrams in plain English, get publication-ready Unicode box-drawing diagrams. Supports flowcharts, sequence, ER, architecture diagrams and more.

Generate a secure Docker-based npm wrapper that sandboxes installs and builds. Blocks supply chain attacks like the axios RAT.

Generate .yolobox.toml configs and CLI commands for running AI coding agents in isolated containers. Supports Claude, Codex, Gemini, and more.

Generate x402 payment middleware code for Express, Hono, Next.js, Fastify, Gin, FastAPI, Flask, and client SDKs. Configure routes, pricing, and networks visually.

Estimate monthly Cloudflare developer platform costs across Workers, R2, D1, KV, Durable Objects, and 13 more products. Compare free vs paid tiers.

Compare two code snippets side by side and highlight every difference with line numbers.

Generate Yoyo PHP component boilerplate with properties, actions, events, computed properties, and lifecycle hooks. Supports PHP, Blade, and Twig templates.

Generate Yoyo PHP framework bootstrap and configuration code for PHP, Blade, or Twig with vanilla PHP or Laravel integration.

Build Yoyo spinning and loading state attributes interactively with show/hide, CSS class toggling, attribute setting, and live preview.

Analyze your Claude Code token usage, costs, and session data locally. Drop your JSONL files and get instant charts. 100% private, nothing leaves your browser.

Directory of blockchain testnet faucets. Get free test ETH, USDC, SOL for Ethereum, Base, Arbitrum, Solana and more. MetaMask configs included.