Developer Tools | JSON, Encoding, Formatting & Code Utilities

XPath Online Tester

Test XPath expressions right in your browser and see matches instantly — great for web scraping, data collection, and front-end debugging.

C/C++ Code Formatter & Beautifier

Free online C/C++ code formatter and beautifier. Quickly standardize indentation, brace styles, and format your C and C++ code instantly.

Golang Regex Tester

An online regex tester designed for Go developers. Validate RE2 syntax rules and view match results and capture groups in real-time.

Norway Address Generator

Generate fake addresses in standard Norwegian formats. Ideal for development testing, data mocking, and privacy protection.

CSS3 Code Generator

Visually customize CSS3 effects like border radius, shadows, and gradients. Generate code in real time and apply it to your website in seconds.

Code to Image Tool

Generate beautiful code screenshots with one click, supporting multi-language syntax highlighting and customizable themes.

Kubernetes China Mirror Address Reference

Browse mirror reference addresses, with a documented DaoCloud mapping for registry.k8s.io.

Java-Style Regex Browser Preview

Preview common Java-style pattern inputs using a browser JavaScript regex engine.

JSONPath Evaluator

Accurately extract data from JSON documents using JSONPath expressions. Supports recursive queries and filter expressions.

C# Code Formatter

Free online C# code formatter and beautifier. Instantly standardize indentation, fix layout issues, and improve your code's readability.

UUID Format Converter & Validator

Professionally handle UUID format conversions and validity checks. Supports multiple formats including standard, pure hex, and URN.

Cron Expression Generator

Generate Cron expressions online and visually configure scheduled tasks.

Character Encoding Detector

Quickly identify text encoding types and fix gibberish text.

Lorem Ipsum Generator

Quickly generate Latin placeholder text for design and typography. Supports paragraphs, sentences, and words.

JSON to JSON Schema Converter

Automatically convert JSON data structures into JSON Schema definitions for seamless data validation and API documentation generation.

Shannon Entropy Calculator

Calculate the information entropy of text or data sequences to evaluate uncertainty and randomness.

HTML Table Generator

Create HTML table code visually with drag-and-drop. Merge cells, customize styles, and copy the code in one click.

Bootstrap Visual Layout Builder

Build Bootstrap grid layouts with drag and drop. Create page structures fast—no hand-coded HTML or CSS needed.

Excel to JSON Converter Online

Convert copied Excel cells into row-based JSON objects or arrays

Mermaid Chart Generator

Generate Mermaid chart code online. Supports multiple types including flowcharts and sequence diagrams.

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