Developer Tools

Essential utilities for modern software development, DevOps, and API testing.

JSON Validator

Validate and format JSON data. Check syntax errors, view structure, and beautify JSON for debugging and development.

Validate JSON

Build cron expressions visually with an easy-to-use interface. Generate schedule patterns for task automation.

Build Cron

Create and test regular expressions with real-time matching. Get explanations for regex patterns and debug complex expressions.

Build Regex

Calculate chmod permissions in numeric and symbolic format. Understand Unix file permissions for secure server management.

Parse and understand HTTP headers. Get detailed explanations of common headers for debugging web requests.

Parse Headers

Generate JSON Web Tokens with custom payloads. Create JWTs for authentication testing and API development.

Generate JWT

Create mock JSON API responses for testing. Generate sample data for users, products, posts, and error responses.

Mock API

Learn how to test webhooks with dedicated testing services. Understand webhook debugging and request inspection.

Test Webhooks

Generate .env file templates for various frameworks. Quick-start configuration for Flask, Node.js, Docker, and more.

Generate .env

Validate docker-compose.yml files for syntax and structure. Check for common issues before deployment.

Validate Compose