🔒 100% Client-Side Processing | ⚡ Works Offline
A collection of 9 privacy-first web tools that run entirely in your browser with zero data collection. Perfect for developers, security professionals, and privacy-conscious users.
🌐 Live Site: https://bytetools.io
- Regex Tester - Test patterns with 50+ examples
- JWT Decoder - Decode tokens safely (jwt.io alternative)
- URL Encoder - Encode/decode URLs
- JSON Formatter - Format, validate, minify JSON
- Passphrase Generator - Generate secure, memorable passphrases
- File Hash Generator - MD5, SHA-1, SHA-256 checksums
- Base64 Encoder - Encode/decode Base64
- QR Generator - WiFi, contact, URL QR codes
- IP Subnet Calculator - CIDR, subnetting, supernetting
AI Studio Hub - 7 privacy-first AI developer tools for building production-ready AI applications:
- Prompt Designer - Build prompts visually with variables & templates
- Token Calculator - Calculate costs for GPT-4, Claude, Gemini
- Guardrail Designer - AI safety & compliance rules
- Chunking Optimizer - RAG document chunking strategies
- Vector Simulator - Test embeddings & similarity
- Function Schema Builder - OpenAI function calling schemas
- Pipeline Designer - Visual AI workflow builder
Browse All Guides - 20,000+ words of developer content optimized for "how to" searches
- AI Prompt Design Best Practices (2,100+ words) - Master prompt engineering techniques
- AI Security Best Practices (18-min read) - API key protection, prompt injection defense
- AI Privacy & GDPR Compliance (16-min read) - Build compliant AI systems
- AI Token Costs: Calculate & Reduce Expenses - Reduce GPT-4/Claude costs by 50-90%
- AI Safety Guardrails - 4 ready-to-use templates
- RAG Chunking Strategies - Optimize document splitting
- OpenAI Function Calling Guide - 15+ JSON schema examples
- How to Test Regex Patterns - Step-by-step regex testing
- How to Encode URLs - Complete URL encoding guide
- JWT Decoding Guide - Understanding JWT tokens
- File Hashing Guide - Verify file integrity
- Base64 Encoding Guide - Data encoding explained
- Security Best Practices - Developer security guide
- Browser-Based Tools Privacy - Why client-side processing matters
- Secure Passphrase in Browser - Generate strong passphrases
- Increase Passphrase Adoption - Team implementation strategies
- WebDev Productivity with ByteTools - Workflow optimization
- WiFi QR Codes Guide - Network sharing
- QR Codes for Resumes - Professional documents
- Natural Language QR - AI-generated QR codes
- Secure Passwords Guide - Password best practices
- JSON Formatting Guide - JSON best practices
Browse All Blog Posts - In-depth technical articles and guides
- How to Secure Your OpenAI API Keys (2025) - Prevent $100K+ breaches
- Prompt Injection Attacks: Complete Defense Guide - LLM security
- ChatGPT Privacy Risks Explained - Data retention & GDPR
- Privacy-First AI Development: Why It Matters in 2025 - GDPR-compliant AI
- AI Prompt Engineering Guide (5,400+ words) - Comprehensive prompt engineering
- How to Reduce AI API Costs by 60% - Real $5K→$2K savings
- RAG Systems Complete Guide - Retrieval Augmented Generation
- Building Production AI Applications: Complete Checklist - Reliability & monitoring
- JWT Decode Complete Guide (3,000+ words) - Debugging authentication
- File Hash Verification Guide: MD5, SHA-1, SHA-256 - Verify file integrity
- Passphrase Security 2025 Trends - Enterprise adoption
- Privacy-First Tools: Client-Side Processing - Why it matters
- 🔒 100% Private: All processing happens in your browser - no data ever leaves your device
- ⚡ Lightning Fast: Static generation with optimized performance
- 📱 Mobile-Optimized: Responsive design works perfectly on all devices
- 🌐 Works Offline: Tools function without internet after initial load
- 🚫 No Registration: Use all tools instantly without creating accounts
- 🛡️ Enterprise-Ready: No data transmission makes it perfect for secure environments
- 🔐 Security.txt: Responsible disclosure policy
- ✅ 100% client-side processing — your data never leaves your browser
- ✅ Zero data collection or tracking (beyond anonymous analytics)
- ✅ Works offline after initial load
- ✅ No registration or sign-up required
- ✅ Enterprise-approved (no data transmission concerns)
- vs jwt.io: Your tokens stay local (not sent to Auth0 servers)
- vs regex101: Works offline, no account needed
- vs beautifier.io: No ads, faster performance
- vs password generators: Memorable passphrases, not random strings
- Framework: Next.js 15.3.5 with TypeScript
- Styling: Tailwind CSS with gradient designs
✅ Zero data collection (vs competitors who track/store data) ✅ Works offline (vs server-dependent tools) ✅ No registration required (vs account-required tools) ✅ Enterprise-approved (no data transmission concerns) ✅ Step-by-step tutorials (optimized for "how to" searches) ✅ Comprehensive AI guides (20,000+ words on AI development)
- Privacy-First: Never add features that compromise client-side processing
- Performance: Maintain fast load times and minimal bundle size
- Accessibility: Ensure all tools work on mobile and desktop
- SEO-Optimized: Target security-conscious and developer audiences
- Enterprise-Ready: Consider compliance and security requirements
- Main Site: bytetools.io
- All Tools: bytetools.io
- AI Studio: bytetools.io/ai-studio
- Guides: bytetools.io/guides
- Blog: bytetools.io/blog
- About: bytetools.io/about
- Privacy: bytetools.io/privacy
- Security: bytetools.io/.well-known/security.txt
We welcome contributions! Focus areas:
- Performance optimizations
- New privacy-first tools
- SEO and accessibility improvements
- Mobile experience enhancements
- AI development guides and tutorials
This project is licensed under the MIT License - see the LICENSE file for details.
Built with privacy in mind 🔒 | Optimized for performance ⚡ | Designed for developers 👩💻👨💻