Development Tools
Tools for software development
11 tools
Crontab Timezone Generator
Professional Crontab timezone generator with cross-timezone scheduling and visual Cron editing
Text Diff Checker
Professional text comparison tool with syntax highlighting for multiple programming languages
JSON Formatter & Validator
Professional JSON processing tool with formatting, validation, error checking, and repair suggestions
Base64 Encoder/Decoder
Free, fast online Base64 encoding and decoding tool
XML Formatter & Validator
Professional online XML processing tool with formatting, validation, and error checking
Random Password Generator
Free online random password generator with customizable length and character types
Database Key Length Designer
Interactive database primary key design tool based on Birthday Paradox collision probability, supporting UUID v7 compact format
Directory Tree Converter
Convert directory tree text to various formats including JSON and Markdown
Mermaid Chart Editor
Visual Mermaid chart editor supporting flowcharts, sequence diagrams, and more
Flowchart Editor
Visual flowchart editor with drag-and-drop, node editing, and Mermaid export
HTTP Request Simulator
Free online HTTP request simulator supporting GET/POST/PUT/DELETE requests, multiple body formats (JSON/Form/XML), authentication, response formatting and search. An online Postman alternative