Developer Tools
Made Simple
Fast, secure, and privacy-focused tools for developers. All processing happens in your browser - your data never leaves your device.
Popular Developer Tools
JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting
Base64 Encoder/Decoder
Encode and decode Base64 strings quickly and securely
URL Encoder/Decoder
Encode and decode URLs for safe transmission
UUID Generator
Generate unique identifiers (UUID v4) instantly
Password Generator
Generate secure passwords with custom options
QR Code Generator
Create QR codes for URLs, text, WiFi, and more
Color Converter
Convert between HEX, RGB, HSL, and HSV color formats
Text Diff Checker
Compare two texts and highlight differences
cURL to Code
Convert cURL commands to code in multiple languages (Python, JavaScript, Go, Java, etc.)
Cron Expression
Convert between cron expressions and natural language. Preview schedules with timezone support.
CORS Preflight Doctor
Diagnose CORS preflight issues and get minimal server fixes for your API requests.
JWT Encoder/Decoder
Encode and decode JWTs, inspect claims, and verify HS256/RS256 signatures in-browser
HTTP Cache Explainer
Analyze HTTP caching behavior across browser, CDN, and proxy layers with minimal header fixes.
Schema Markup Generator
Generate Google SERP schema markup (FAQ, HowTo, Article, Product, LocalBusiness, Recipe) with live preview
Sample Tool
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Checklist Tool
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Zap Tool
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Desc Tool
Handy demo tool with short description.
KW Tool
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Why Choose UtilsPlus?
Built by developers, for developers. Experience the difference.
Privacy First
All processing happens in your browser. Your data never touches our servers, ensuring complete privacy and security.
Lightning Fast
Optimized for speed with instant results. No waiting, no loading screens - just immediate, accurate results.
Always Free
No registration, no limits, no hidden fees. Professional-grade tools available to everyone, completely free.
Most Popular Tools
Start with these frequently used developer tools
How Our Developer Tools Work
Understanding the technology behind our privacy-focused developer utilities and why they're trusted by thousands of developers worldwide
Client-Side Processing for Maximum Privacy
All our developer tools utilize advanced client-side JavaScript processing, meaning your sensitive data never leaves your browser. This approach ensures maximum privacy and security while providing instant results for JSON formatting, Base64 encoding, UUID generation, and more.
- • Zero data transmission: Your files and data stay on your device
- • Instant processing: No network delays or server round-trips
- • Offline capability: Works without internet after initial load
- • GDPR compliant: No cookies or data collection required
Modern Web Standards & Performance
Built with cutting-edge web technologies including Next.js 14, TypeScript, and modern JavaScript APIs. Our tools are optimized for performance and compatibility across all modern browsers and devices.
- • Lightning fast: Optimized for sub-second load times
- • Mobile-first design: Perfect on phones, tablets, and desktops
- • Cross-browser support: Works on Chrome, Firefox, Safari, Edge
- • PWA ready: Install as a desktop or mobile app
Why Choose UtilsPlus Over Other Developer Tools?
Compare our free online developer tools with desktop applications and other online services
| Feature | UtilsPlus | Desktop Apps | Other Online Tools |
|---|---|---|---|
| Privacy & Security | ✓ 100% Client-side | ⚠ Varies | ✗ Server uploads |
| Installation Required | ✓ No installation | ✗ Download & install | ✓ Browser-based |
| Speed & Performance | ✓ Instant results | ✓ Fast local | ✗ Network delays |
| Cost | ✓ Always free | ✗ Often paid | ⚠ Freemium |
| Device Compatibility | ✓ All devices | ✗ OS specific | ✓ Cross-platform |
Complete Guide to Online Developer Tools
Learn how to effectively use each tool for maximum productivity in your development workflow
JSON Formatter Best Practices
Master JSON formatting, validation, and debugging techniques. Learn proper JSON syntax, common validation errors, and optimization strategies for large JSON files.
- • Validate JSON before API calls
- • Use proper indentation for readability
- • Minify JSON for production deployments
- • Handle Unicode characters correctly
Base64 Encoding Guide
Understand Base64 encoding for file uploads, data URLs, email attachments, and API integrations. Learn the differences between standard and URL-safe encoding.
- • Encode images for CSS data URLs
- • Handle binary data in JSON APIs
- • Secure file transmission methods
- • Optimize encoding for web performance
UUID Generation Strategies
Choose the right UUID version for your use case. Compare v1 (timestamp), v4 (random), and v7 (sortable) UUIDs for databases, APIs, and distributed systems.
- • Database primary key generation
- • Distributed system identifiers
- • Session and request tracking
- • Collision-free ID generation
Secure Password Creation
Generate cryptographically secure passwords with customizable complexity. Understand entropy, character sets, and password strength indicators for maximum security.
- • High-entropy password generation
- • Custom character set options
- • Bulk password creation
- • Password strength analysis
QR Code Implementation
Create QR codes for URLs, WiFi credentials, contact information, and app deep links. Optimize for different use cases with custom error correction and sizing.
- • Mobile app integration
- • WiFi network sharing
- • Contact information exchange
- • Print-ready QR code generation
URL Encoding Standards
Handle URL encoding for query parameters, form data, and API endpoints. Learn percent-encoding, character escaping, and international character support.
- • Query parameter encoding
- • Form data preparation
- • International character handling
- • REST API URL construction
Developer Resources
Essential information and guides for web developers
JSON Best Practices
Learn proper JSON formatting, validation techniques, and common pitfalls to avoid when working with JSON data in your applications.
Encoding Standards
Understand Base64, URL encoding, and other encoding methods essential for web development and data transmission.
Security Guidelines
Best practices for generating secure passwords, UUIDs, and handling sensitive data in web applications.