If you’ve ever stored a password in plain text, you owe your users an apology. Cryptography isn’t optional anymore — it’s the foundation of everything from JWT auth to blockchain. Yet most developers don’t have a reliable set of tools to hand.
Good news: ElysiaTools has you covered with 6 free, browser-based cryptography tools. No sign-up. No install. No excuses.
1. Hash Generator — MD5, SHA1, SHA256, SHA512
A hash is a one-way fingerprint of any data. Change one character and the hash looks completely different.
The Hash Generator at elysiatools.com/en/tools/hash-generator supports MD5, SHA1, SHA256, and SHA512 — and can handle text input, hex input, or base64 input.
Why it matters: Checksums let you verify file integrity, detect tampering, and validate downloads. Every security-conscious developer needs a quick way to hash something.
Use it when: You’re verifying a downloaded file matches the original, checking API payload integrity, or generating non-reversible IDs.
2. Bcrypt Generator — Password Hashing That Actually Stands Up
MD5 and SHA256 are fast. That’s the problem. A modern GPU can try billions of hashes per second against a stolen password database.
Bcrypt is different. It has a cost factor — you control how long it takes to hash. The higher the cost, the harder it is to brute-force, even with specialized hardware.
The Bcrypt Generator at elysiatools.com/en/tools/bcrypt-generator lets you pick the number of rounds (cost factor). More rounds = stronger hash = slower generation.
Use it when: Storing user passwords. Always use bcrypt (or scrypt, or Argon2) for passwords. Never MD5. Never SHA256.
3. Bcrypt Validator — Instantly Check if a Password Matches
The flip side of hashing: you need to verify a password against a stored hash.
The Bcrypt Validator at elysiatools.com/en/tools/bcrypt-validator takes a password and a bcrypt hash, then tells you in milliseconds whether they match.
This means you can build a login system where the original password is never stored — only the bcrypt hash. Even if your database is breached, the attacker gets hashes that are computationally expensive to crack.
Use it when: Building auth systems, validating admin credentials, or auditing existing password databases.
4. PBKDF2 Generator — Key Derivation for Sensitive Data
PBKDF2 (Password-Based Key Derivation Function 2) is like bcrypt’s cousin — it stretches weak passwords into strong cryptographic keys using thousands of iterations.
The PBKDF2 Generator at elysiatools.com/en/tools/pbkdf2-generator lets you configure the algorithm (SHA256, SHA512, etc.), iteration count, and output key length.
Why it matters: PBKDF2 is widely used in encryption standards including PDF encryption, WiFi (WPA2), and file archiving (ZIP, PDF). Understanding it helps you work with these formats.
Use it when: Deriving encryption keys from passwords, generating secure keys for file encryption, or implementing key stretching in your own applications.
5. PBKDF2 Validator — Verify PBKDF2 Keys Without Guesswork
If you’ve generated a PBKDF2 key, you need a way to verify it later — whether it’s a user resetting their password or a system checking an encryption key.
The PBKDF2 Validator at elysiatools.com/en/tools/pbkdf2-validator handles exactly that: input a password, salt, and derived key — get a yes or no.
Use it when: Validating derived keys, auditing PBKDF2 implementations, or building password-based encryption systems.
6. Scrypt Generator — Memory-Hard Hashing for Maximum Security
Scrypt is the heavyweight champion of password hashing. While bcrypt uses CPU time as its cost factor, scrypt also demands large amounts of memory — making GPU-based attacks orders of magnitude more expensive.
The Scrypt Generator at elysiatools.com/en/tools/scrypt-generator lets you explore scrypt parameters including CPU/memory cost, block size, and parallelism factor.
Why it matters: Scrypt is used by some of the most security-conscious platforms. If bcrypt is a strong deadbolt, scrypt is a vault door.
Use it when: You need the highest possible protection for very sensitive keys, or when compliance frameworks require scrypt.
7. Scrypt Validator — Verify Scrypt-Derived Keys
The counterpart to the Scrypt Generator: validate that a given password produces the expected scrypt hash.
Find it at elysiatools.com/en/tools/scrypt-validator.
8. JWT Generator & Decoder — Work with JSON Web Tokens
JWTs are everywhere in modern auth — but debugging them is painful. The raw token looks like random garbage, and good luck reading the payload without a tool.
The JWT Generator at elysiatools.com/en/tools/jwt-generator creates tokens with HS256 or HS384 signing, custom claims, and configurable expiry.
The JWT Decoder at elysiatools.com/en/tools/jwt-decoder takes any JWT and shows you the header, payload, and signature — clearly formatted, instantly readable.
Use it when: Building auth systems, debugging “why is my token rejected,” or generating test tokens for development.
Why These Tools Matter
The cryptography tools on ElysiaTools cover the full lifecycle:
- Generate hashes, bcrypt/scrypt/PBKDF2 passwords, and JWTs
- Validate passwords against stored hashes, verify derived keys, decode JWT payloads
- Learn by experimenting with parameters — see how bcrypt cost factor affects generation time, or how different salts change the output
Every tool runs entirely in your browser. No data is sent to any server. Your passwords and tokens never leave your machine.
The Problem Nobody Talks About
Most developers learn about hashing by making the same mistake: using MD5 or SHA256 for passwords, because those are the algorithms they see in tutorials.
This is the same reason so many password databases get cracked in hours after a breach. Fast hashes = fast attacks.
These 8 tools give you the real cryptography — the kind that holds up against real attacks. Bookmark them. Use them. Your users’ data will thank you.
All tools are free, run in-browser, and are part of the ElysiaTools project — a collection of 1,598 free online tools.
