GeneratePass.
Password & Security Tools.
Generate passwords, passphrases, hashes, and secure identifiers. Analyze strength, check for breaches, and learn security — all running locally in your browser.
- 30 browser-only tools
- Web Crypto API CSPRNG
- No accounts required
How It Works
- 01 All calculations run in your browser Passwords never leave your device.
- 02 Uses Web Crypto API CSPRNG OS-level entropy, not Math.random().
- 03 One exception: Breach Checker Uses HIBP k-anonymity — only a 5-char hash prefix is sent.
- 04 No accounts, no tracking No sign-up, no cookies, no analytics on tool usage.
Password Generator
Generate a cryptographically secure random password.
Recent History
Security Score Dashboard
Check the options that match your current security habits. We calculate your grade locally in real-time.
Audit Questions Check all that apply
Excellent! Your habits represent the gold standard of modern cybersecurity.
Built for Real People
Developers & Engineers
Generate API keys, HMAC tokens, UUIDs, and salt values. Verify file checksums with SHA-256. Decode JWT tokens. All operations run locally — no server round-trips for sensitive data.
Security-Conscious Users
Generate strong, unique passwords for every account. Check if your credentials have appeared in known breaches. Analyze password strength with entropy calculations, not just character checklists.
Students & Learners
Understand how cryptographic hashing works with hands-on SHA-256 and MD5 tools. Learn what entropy means. See how k-anonymity protects your privacy. Educational content accompanies every tool.
IT Administrators
Check passwords against NIST, PCI-DSS, and HIPAA policies. Generate bulk credentials for team onboarding. Verify password exposure in breaches before deploying new policies.
Privacy Advocates
Every tool runs in your browser. No accounts, no telemetry, no server-side processing. You can disconnect from the internet and all tools still work — except the breach checker, which uses k-anonymity.
Content Creators & Writers
Generate random usernames, memorable passwords for test accounts, or sample hashes for documentation. Quick, no-signup tools for occasional security tasks.
How We're Different
Zero Server Interaction
Most password tools send your input to a server for processing. GeneratePass never does. The only exception is the breach checker, which uses k-anonymity — your password never leaves your device.
CSPRNG, Not Math.random()
We use the Web Crypto API's crypto.getRandomValues — a cryptographically secure random number generator seeded by your OS entropy pool. Not JavaScript's predictable Math.random().
Static Site, Minimal Attack Surface
Built with Astro, GeneratePass compiles to static HTML and CSS. No server runtime, no database, no CMS vulnerabilities. The attack surface is the same as any static website.
Education Alongside Tools
Every tool includes explanations of how it works, what the results mean, and common mistakes. We don't just give you a password — we explain what makes it strong.
No Accounts, No Tracking
No sign-up required. No cookies for tool usage. No analytics on what you generate. The site works the same for everyone, whether you visit once or daily.
Open About Limitations
We tell you what our tools can't do. The breach checker only checks known breaches, not real-time threats. Entropy is one measure of strength, not the only one. Honesty builds trust.
Which Tool Do I Need?
I need to create a new password
- → Password Generator — random characters (best for most accounts)
- → Passphrase Generator — memorable word sequences (best for master passwords)
- → PIN Generator — numeric codes (for device locks, 2FA backup)
I want to check an existing password
- → Strength Checker — entropy, crack time, pattern detection
- → Breach Checker — has this password appeared in known breaches?
- → Policy Checker — does it meet NIST/PCI-DSS/HIPAA requirements?
I need to hash data or verify integrity
- → SHA-256 Generator — file checksums, data verification
- → HMAC Generator — API authentication, message signing
- → Hash Identifier — identify an unknown hash algorithm
I need unique identifiers
- → UUID Generator — database keys, API request IDs
- → NanoID Generator — short, URL-friendly identifiers
- → ULID Generator — time-sortable identifiers
30 Browser-Only Tools
Organized into five categories. Every tool runs locally using the Web Crypto API.
Secret Generators
6 toolsGenerate cryptographically secure passwords, passphrases, PINs, tokens, and usernames.
Password Analysis
6 toolsAnalyze password strength, entropy, crack time, and compliance with security policies.
Cryptographic Hashing
5 toolsGenerate SHA-256, MD5, HMAC hashes and identify unknown hash algorithms.
Encoding & Identity
8 toolsEncode, decode, and generate UUIDs, NanoIDs, ULIDs, Base64, JWT, and more.
Security Tools
5 toolsCheck for data breaches, calculate entropy, and generate memorable passphrases.
Featured Tools
The tools people use most often, with clear explanations of what they do.
Password Generator
Generate unpredictable passwords locally using the Web Crypto API.
Strength Checker
Analyze entropy, crack time, and security rating of any password.
Breach Checker
Check if your password appears in known data breaches using k-anonymity.
Passphrase Generator
Generate memorable Diceware passphrases for master passwords.
SHA-256 Generator
Compute SHA-256 hashes for data integrity and verification.
UUID Generator
Generate cryptographically secure UUID v4 identifiers.
Security Knowledge Base
Guides and articles organized by topic to help you understand password security, cryptography, and privacy.
Password Security
Entropy, managers, MFA, and best practices for strong credentials.
Authentication
MFA, passkeys, TOTP, hardware keys, and authentication methods.
Cryptography
Encryption, hashing, SHA-256, and encoding explained.
Online Safety
Phishing, malware, safe browsing, and digital hygiene.
All Articles
38 articles on passwords, breaches, hashing, and online privacy.
Complete Security Guide
Comprehensive overview of password security in 2026.
Latest Articles
Authenticator Apps Explained: TOTP, HOTP, and Setup Guides
Understand how authenticator apps generate TOTP and HOTP codes, how seed secrets work, and how to set up and migrate between apps.
Base64 Myths Debunked: What Encoding Actually Does (and Doesn't Do)
Debunking the most common Base64 myths, explaining what Base64 encoding is, what it is not, and when you should—and shouldn't—use it.
Beginner's Guide to Multi-Factor Authentication (MFA)
Learn what MFA is, how authentication factors work, and which methods — TOTP, SMS, hardware keys — offer the best protection for your accounts.
Frequently Asked Questions
Introduction
The Password Generator is a professional security utility designed to generate cryptographically secure random credentials. Traditional passwords created by humans are highly predictable due to cognitive biases. This tool eliminates the human element entirely by utilizing entropy from the browser's Web Cryptography engine, creating random sequences of letters, numbers, and symbols that protect digital vaults against cracking rigs.
What This Tool Does
The Password Generator is a professional security utility designed to generate cryptographically secure random credentials. Traditional passwords created by humans are highly predictable due to cognitive biases. This tool eliminates the human element entirely by utilizing entropy from the browser's Web Cryptography engine, creating random sequences of letters, numbers, and symbols that protect digital vaults against cracking rigs.
How It Works
When you generate a password, our script determines the chosen character pool size (R) and the required password length (L). It allocates a TypedArray of 32-bit unsigned integers and runs window.crypto.getRandomValues. This gathers system entropy from local hardware sources (like CPU states and cursor changes) to select characters completely at random, avoiding mathematical seed vulnerabilities found in pseudo-random algorithms.
Benefits
- 100% private: Operates fully inside browser memory. Your credential never transits the network.
- Customizable: Supports custom lengths up to 128 characters and optional exclusions.
- High entropy: Guarantees balanced distribution of complexity requirements.
Security Information
No data is transmitted or stored on backend tables. All computations execute within the sandbox of your browser tab. We use the native Web Crypto API CSPRNG standard.
Best Practices
- Aim for at least 16 characters for administrative accounts.
- Ensure all character set selectors (A-Z, a-z, 0-9, symbols) are checked.
- Exempt confusing characters if you need to read or type credentials manually.