Security tools on it.you help developers, sysadmins, and security professionals handle common security tasks without relying on untrusted online services. Generate a cryptographically strong random password, hash a string with SHA-256, decode a JWT to inspect its claims, generate a bcrypt hash for password storage, or check whether a password meets modern security standards — all without sending sensitive data anywhere.

Every tool in this category runs entirely in your browser. Password hashing, JWT decoding, and key generation all happen locally using the browser's Web Crypto API and JavaScript. No passwords, hashes, or tokens are transmitted to any server. This is a hard requirement for security-sensitive workflows.

Who uses these tools?

Backend developers

Generate bcrypt hashes for password storage, decode JWTs to debug auth flows, create test API keys.

Security engineers

Verify hash algorithms, check password entropy, audit JWT claims, and build content security policies.

Sysadmins

Generate strong passwords for service accounts, check the strength of existing passwords, hash configuration values.

Students & learners

Understand the difference between encoding, hashing, and encryption with live, interactive tools.

What's in this category?

Password Generator

Generate strong, random passwords with custom rules.

Password Strength Checker

Check how strong your password really is.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes instantly.

Bcrypt Hash Generator

Generate and verify bcrypt password hashes.

JWT Decoder

Decode and inspect JWT tokens without verification.

Tool types in this category

Type	Count	How it works	Privacy
Browser-only	5	Runs entirely in your browser — no server requests	No data leaves your device

Key concepts

Password entropy — A measure of unpredictability in bits. A 12-character password using uppercase, lowercase, numbers, and symbols has ~79 bits of entropy — currently considered strong against brute force.

Bcrypt — An adaptive password hashing function that includes a work factor (cost). As hardware gets faster, the cost can be increased to keep hashing slow. The standard for password storage alongside Argon2 and PBKDF2.

SHA-256 — A cryptographic hash function in the SHA-2 family producing a 256-bit digest. Used for data integrity, digital signatures, and TLS certificates. Not suitable for password hashing (too fast).

JWT (JSON Web Token) — A compact, URL-safe token format consisting of three Base64-encoded parts: header (algorithm), payload (claims), and signature. Used for stateless authentication and authorization.

Rainbow table — A precomputed lookup table of hash → plaintext mappings used to crack password hashes. Defeated by salting — adding a unique random value to each password before hashing.

TLS (Transport Layer Security) — The cryptographic protocol that secures HTTPS, SMTP, and other internet communications. Provides authentication, data integrity, and encryption via asymmetric key exchange + symmetric cipher.

Frequently asked questions

What makes a password strong?

Length is the most important factor. A 16+ character random password using mixed case, numbers, and symbols is extremely strong. Avoid dictionary words, predictable substitutions (@ for a), and reuse across sites.

What is the difference between hashing and encryption?

Hashing is one-way — you cannot reverse a hash to get the original input. Encryption is two-way — data can be decrypted with the right key. Use hashing for password storage; use encryption when you need to recover the original data.

How does bcrypt work?

Bcrypt generates a random salt, incorporates it into the hash, and applies its Blowfish-derived algorithm multiple times (rounds = 2^cost). The output includes the salt and cost factor, so it is self-contained and portable.

Is it safe to decode JWTs in a browser tool?

The it.you JWT decoder runs entirely in your browser — no token data leaves your device. That said, never paste production user tokens or tokens containing sensitive claims into any online tool unless you are certain it is client-side only.

What is a Content Security Policy (CSP)?

CSP is an HTTP response header that tells browsers which scripts, stylesheets, and media sources are trusted. It is the primary mitigation against cross-site scripting (XSS) by blocking inline scripts and untrusted external sources.

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