Crypto & Security Tools
Free online cryptography and security tools — hashing, encryption, token and key generation, password strength, and more. Everything runs in your browser.
Crypto & Security Tools
- Token generator — Generate random string with the chars you want, uppercase or lowercase letters,
- Hash Text Generator (MD5/SHA) — Hash a text string using the function you need : MD5, SHA1, SHA256, SHA224, SHA5
- Bcrypt — Hash and compare text string using bcrypt. Bcrypt is a password-hashing function
- UUIDs generator — A Universally Unique Identifier (UUID) is a 128-bit number used to identify info
- ULID Unique ID Generator — Generate ULIDs (Universally Unique Lexicographically Sortable Identifiers) onlin
- Encrypt / decrypt text — Encrypt clear text and decrypt ciphertext using crypto algorithms like AES, Trip
- BIP39 passphrase generator — Generate a BIP39 passphrase from an existing or random mnemonic, or get the mnem
- HMAC Signature Generator — Computes a hash-based message authentication code (HMAC) using a secret key and
- RSA key pair generator — Generate RSA public/private key pairs online for encryption, digital signatures,
- Password strength analyser — Discover the strength of your password with this client-side-only password stren
- PDF signature checker — Verify the signatures of a PDF file. A signed PDF file contains one or more sign
Crypto & Security Tools Guides
- What Is a Random Token Generator and Why Do You Need One?
- API Rate Limiting: Strategies, Algorithms, and Implementation
- What Is Rate Limiting? Algorithms, Implementation, and Best Practices
- How to Hash Text Online: MD5, SHA-1, SHA-256, and More
- SHA-256 Hash: How It Works, How to Generate, and When to Use It
- Hash Functions Explained: MD5 vs SHA-256 vs bcrypt — Which Should You Use?
- What Is SHA-256? How the Hash Function Works and Where It Is Used
- Bcrypt Password Hashing: The Complete Developer Guide
- Password Hashing Explained: bcrypt, SHA-256, Argon2, and What to Actually Use
- How to Store Passwords Securely: The 2025 Developer Checklist
- UUID vs ULID: Which Unique ID Should You Use?
- UUID vs ULID: Which Unique ID Should You Use?
More Crypto Guides
- Migrating from MD5 to SCRAM-SHA-256: A Practical Guide for PostgreSQL
- Node.js Environment Variables: The Right Way to Handle Config and Secrets
- Advanced CI/CD with GitHub Actions: Secrets, Environments, Matrix Builds, and Reusable Workflows
- AI Code Assistants in 2026: How to Actually Use GitHub Copilot and Cursor
- OpenAI API Integration Guide: Build AI Features in Your App
- Go Concurrency: Goroutines, Channels, and Patterns That Actually Scale
- What Is a Webhook? How Webhooks Work and How to Build Reliable Handlers
- React Patterns in 2026: Compound Components, Render Props, and Custom Hooks
- Environment Variables and Secrets Management: The Complete Production Guide
- How HTTPS and TLS Work: A Visual Deep Dive for Developers
- HTTPS and TLS Certificates: Let's Encrypt, mTLS, and HSTS
- API Security Best Practices: OWASP API Top 10 Prevention
- JWT Refresh Token Rotation: Secure Auth with Theft Detection
- AWS Cloud Security Best Practices: IAM, VPC, and Security Controls
- DevSecOps: Shifting Security Left in CI/CD Pipelines
- Security Incident Response: Detection, Containment, and Recovery
- Enterprise SSO: SAML 2.0 and Enterprise Identity Integration
- Cryptography in Practice: Encryption, Hashing, and Key Management
- Container Security: Docker and Kubernetes Hardening Guide
- Zero Trust Security Architecture: Never Trust, Always Verify
- Web Application Penetration Testing: Tools and Methodology
- Dependency Security: Supply Chain Attacks and NPM/PyPI Package Safety
- API Security Best Practices: Authentication, Rate Limiting, and Input Validation
- HTTPS, TLS Configuration, and Certificate Management with cert-manager
- JWT Authentication Security: Common Vulnerabilities and Secure Implementation
- Secrets Management: HashiCorp Vault, Kubernetes Secrets, and AWS Secrets Manager
- API Security: OWASP API Top 10 and Modern Defense Patterns
- Web Security: XSS, CSRF, SQL Injection Prevention and Security Headers
- OAuth 2.0 and OpenID Connect: Complete Implementation Guide
Converter Tools
Web Developer Tools
Image & Video Tools
Developer Utilities
Network Tools
Math & Calculator Tools
Measurement Tools
Text Tools
Data Tools