Complete Web Security Guide 2026
Secure your applications against modern threats. Learn about AES encryption, secure password hashing, RSA key generation, and preventing XSS.
What you'll learn in this guide
1Core Concepts & Tutorials
How Secure is My Password? Entropy & GPU Cracking Guide (2026)
Calculate Password Entropy Bits — Complete Guide
Bcrypt vs Argon2: Password Hashing Explained
AES Encryption in the Browser — JavaScript 2026
2Practical Tools
Apply what you've learned. These client-side tools are relevant to this topic cluster and process all data securely in your browser.
Recommended Developer Utilities
Free, private, client-side tools relevant to this guide.
Offline Password Entropy & Strength Tester
A complete cryptographic toolkit for passwords. Generate highly entropic passwords, test their cracking time against modern hardware, and evaluate their strength without ever transmitting your keystrokes over the internet.
Bcrypt Password Hasher
Generate secure Bcrypt hashes for your application passwords. Our professional tool supports custom cost factors (salt rounds) and follows industry-standard security protocols for password storage.
AES Encryption & Decryption
Secure your sensitive text and data with Advanced Encryption Standard (AES). Encrypt and decrypt strings using 128, 192, or 256-bit keys with professional-grade privacy and 100% local processing.
Content Security Policy (CSP) Builder
Build perfectly formatted Content Security Policies (CSP) to protect your website from XSS, clickjacking, and data injection. A professional visual builder for complex security headers.
XSS Payload Scanner (Sim)
Identify potential Cross-Site Scripting (XSS) vulnerabilities in your text and code. A professional utility for auditing unescaped HTML tags and malicious script payloads in your applications.
RSA Key Pair Generator
Generate secure RSA public and private key pairs. Create keys for SSH, email encryption, and secure API communication with custom bit-lengths and professional PEM formatting.
3Quick Reference
Security Header Checklist
Frequently Asked Questions
Q.Should I encrypt passwords in my database?
No, you should hash them, not encrypt them. Encryption is reversible if you have the key; hashing is a one-way mathematical function. Use Argon2 or Bcrypt for hashing passwords.
Q.What is the difference between Hashing and Encryption?
Encryption is meant to be decrypted later (requires a key). Hashing is one-way (cannot be reversed). Encryption is for storing secret data; hashing is for verifying data integrity (like passwords or file checksums).