Online Developer Tools
Free, fast and secure utilities. No sign-up, no installation. Everything is processed in your browser.
Available tools
JSON Formatter
Format, validate and beautify your JSON code online
Base64 Encode/Decode
Encode and decode text in Base64 instantly
URL Encoder/Decoder
Encode and decode URLs and parameters
Password Generator
Generate secure random passwords
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes
UUID Generator
Generate unique UUID v4 identifiers
Timestamp Converter
Convert Unix timestamps to readable dates
Lorem Ipsum Generator
Generate placeholder text for your designs
Color Converter
Convert colors between HEX, RGB and HSL
Word Counter
Count words, characters and lines in your text
Markdown to HTML
Convert Markdown text to HTML with live preview
CSS Minifier
Minify CSS by removing spaces and comments
QR Generator
Generate QR codes for URLs, text and more
Case Converter
Convert between uppercase, lowercase, camelCase and more
Diff Checker
Compare two texts and find the differences
Regex Tester
Test regular expressions in real time
JSON to CSV
Convert JSON data to downloadable CSV format
HTML Entities
Encode and decode special HTML entities
Cron Parser
Parse cron expressions into plain language
Image to Base64
Convert images to Base64 for HTML/CSS embedding
JWT Decoder
Decode JSON Web Tokens and view header/payload
PX to REM
Convert pixels to REM and vice versa
Meta Tag Generator
Generate SEO, Open Graph and Twitter Card meta tags
HTTP Status Codes
Complete reference of HTTP status codes
SQL Formatter
Format and beautify SQL queries online
YAML Validator
Validate YAML file syntax instantly
String Encoder
Convert text to ROT13, Morse, Binary, Hex and more
Artificial Intelligence Tips
Boost your productivity with these practical AI tips
1. Effective Prompts
Be specific: instead of "write code", use "create a Python function that sorts a list of dictionaries by the 'date' key". Include context, desired output format and constraints.
2. Debugging with AI
Paste the full error along with the relevant code. AI can identify bugs in seconds. Include the stack trace and describe what you expected to happen.
3. Smart Refactoring
Ask AI to refactor your code following SOLID principles, design patterns or language-specific best practices. Always review the suggested changes.
4. Test Generation
AI can generate unit tests automatically. Provide the function and ask for tests covering normal cases, edge cases and expected errors.
5. Automatic Documentation
Generate docstrings, comments and READMEs with AI. Request documentation in JSDoc, Python docstrings or Markdown format depending on your project.
6. Don't Share Sensitive Data
Never paste API keys, passwords, tokens or personal data in AI prompts. Use placeholders like "YOUR_API_KEY" and replace them afterwards.
7. Learn with AI
Use AI as a tutor: "explain how async/await works in JavaScript as if I were 10 years old". Ask for practical examples and exercises to practice.
8. Language Conversion
AI can translate code between languages. "Convert this Python function to TypeScript". Useful for migrations or when working with multiple stacks.
9. Performance Optimization
Ask AI to analyze the time complexity of your algorithm and suggest optimizations. "How can I improve the performance of this SQL query?"
Web Development Blog
Articles, guides and trends for developers
How to Choose Your Tech Stack in 2026
Complete guide for startups: frontend framework comparison, backend options, databases and deployment platforms.
Git Flow vs Trunk-Based Development
Git workflow comparison: pros, cons and when to use each one with real-world examples.
15 Best Practices for REST APIs
Naming conventions, status codes, pagination, versioning, authentication and error handling.
Docker for Developers: A Practical Guide
From Dockerfiles to Docker Compose: everything you need to containerize your applications.
OWASP Top 10: Critical Web Vulnerabilities
The 10 most critical vulnerabilities and how to prevent them in your web applications.
Modern CSS in 2026
Container Queries, Cascade Layers, :has() selector, CSS nesting and View Transitions.
Advanced TypeScript: Generics and Utility Types
Generic types, Partial, Required, Pick, Omit, conditional types and real-world patterns.
Optimizing Core Web Vitals
LCP, INP and CLS explained with practical techniques to improve your score.
Frontend Testing: Complete Guide
Jest, Testing Library and Cypress: testing pyramid, mocks and coverage strategies.
Monorepo vs Polyrepo
Turborepo, Nx, pnpm workspaces: how to organize your projects efficiently.
Frequently Asked Questions
Are these tools free?
Yes, all tools are 100% free and require no sign-up.
Is my data sent to a server?
No. All tools run directly in your browser. Your data never leaves your device.
Can I use these tools on mobile?
Yes, all tools are responsive and work on any device.
Do I need to install anything?
No, you don't need to install any extensions or software. Everything works online.