Developer Tools That Just Work
Format JSON, run SQL queries, write Java, format Python — all free, all instant, all in your browser.
Config Diff
Config Studio
Python Tools Hub
Python helpers for formatting, packaging, dataclasses, and debugging tracebacks.
Spring Boot Tools Hub
Browse Spring Boot converters, validators, generators, and delivery helpers.
Bulk Password Generator
Generate up to 9999 passwords with URL parameters, custom characters, downloads, and optional hashes.
Requirements to pyproject
Convert requirements.txt lines into PEP 621 pyproject dependency entries.
ASCII Banner Generator
Create large terminal, README, and source-code comment banners with configurable subtitles, borders, and wrappers.
Dataclass Generator
Generate Python dataclasses from field definitions with types, defaults, and repr settings.
SQL Playground
Write SQL queries against sample schemas — results as table
Strikethrough Text Generator
Generate strikethrough, underline, slash, double-strike, and decorative Unicode text for Facebook, Twitter/X, Instagram, LinkedIn, and more.
Image to ASCII Art
Convert uploaded images into ASCII art with width, contrast, invert, and color options.
JSON Path Finder
Click any node to get its JSONPath expression
Properties / YAML Validator
Validate your application.properties or .yml — syntax errors, deprecated keys, common misconfigurations.
Python Formatter
Format Python code to PEP 8 standard in your browser
ASCII Generator
Generate stylized ASCII text, separators, boxed headers, and comment-ready text art.
HTML Playground
Write HTML, CSS and JS — see live preview instantly
JPA Entity Generator
Paste a SQL CREATE TABLE and get a fully annotated @Entity class with Lombok, relationships, and Bean Validation.
Traceback Explainer
Extract the failing frame, exception type, and likely fix from a Python traceback.
REST Controller Generator
Generate a complete @RestController with CRUD endpoints, DTOs, service interface, and ResponseEntity patterns.
Java 8 Streams Visualizer
Build Java 8 stream pipelines visually. Drag & drop operations, see the output, get AI explanations and quiz questions.
Security Config Builder
Pick your auth strategy (JWT, OAuth2, Basic, Form) and get a production-ready SecurityFilterChain class.
SQL Interview Lab
Practice 100+ runnable SQL interview questions with HR, ecommerce, and blog analytics schemas. Includes official answers, SQLite execution, and AI explanations.
Diff Checker
Interactive SQL learning — GROUP BY, JOINs, window functions, HAVING. Real SQLite execution, AI explanations.
Css Loaders
Interactive 40+ Css loaders and framework code generators
Profile Config Splitter
Split multi-profile application config into focused dev, test, and prod blocks.
Code Minifier tool
Code Minifier tool - HTML, CSS, JS, TS, Python, Java, Ruby, PHP, and Rust with rich extra features
Exception Handler Generator
Generate a @RestControllerAdvice with typed handlers and consistent error payloads.
Code Snippet Generator
Generate ready-to-use code snippets for Bootstrap, Tailwind, Laravel Blade, Java JSP, Python, Go, Rust, React, Vue, Angular, and more.
GitHub Actions Builder
Generate a GitHub Actions workflow for Maven or Gradle based Spring Boot apps.
Velocity Code Formatter
Format Apache Velocity / VTL templates with directive indentation, spacing cleanup, diagnostics, copy, and download.
Log Formatter
Clean up Spring Boot logs into a readable timeline and grouped stacktrace blocks.
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