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Developer Tools That Just Work

Format JSON, run SQL queries, write Java, format Python — all free, all instant, all in your browser.

All 📋 JSON 1 CODE Code 9 📝 Text 1 ⚡ Generator 4 📄 Diff Checker 2 🍃 Spring Boot 9 🐍 Python 4
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New IDE

SQL Playground

Write SQL queries against sample schemas — results as table

Code 56 uses
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Python Formatter

Format Python code to PEP 8 standard in your browser

Code 52 uses
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IDE

HTML Playground

Write HTML, CSS and JS — see live preview instantly

Code 28 uses
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Java 8 Streams Visualizer

Build Java 8 stream pipelines visually. Drag & drop operations, see the output, get AI explanations and quiz questions.

Code 30 uses
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New

SQL Interview Lab

Practice 100+ runnable SQL interview questions with HR, ecommerce, and blog analytics schemas. Includes official answers, SQLite execution, and AI explanations.

Code 38 uses
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Css Loaders

Interactive 40+ Css loaders and framework code generators

Code 46 uses
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Code Minifier tool

Code Minifier tool - HTML, CSS, JS, TS, Python, Java, Ruby, PHP, and Rust with rich extra features

Code 26 uses
CODE
New IDE

Code Snippet Generator

Generate ready-to-use code snippets for Bootstrap, Tailwind, Laravel Blade, Java JSP, Python, Go, Rust, React, Vue, Angular, and more.

Code 22 uses
VTL
New

Velocity Code Formatter

Format Apache Velocity / VTL templates with directive indentation, spacing cleanup, diagnostics, copy, and download.

Code 42 uses