Free Security Tools Online — Hash Generator, Password, JWT Decoder
Security is non-negotiable in modern development. From generating cryptographic hashes for data integrity to creating strong passwords and inspecting JWT tokens, these tools help you stay secure.
Every tool runs locally in your browser — passwords are never transmitted, hashes are computed client-side, and JWT tokens are decoded without any server round-trip.
Feature Comparison Matrix
| Tool | Function | Algorithm | Client-Side | Best For | Try It |
|---|---|---|---|---|---|
|
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MD5 & SHA Hash Generator
Generate MD5, SHA-1, SHA-256 hashes
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Hash generation | MD5, SHA-1, SHA-256, SHA-512 | ✓ Yes | File integrity, checksums | Open → |
|
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Password Generator
Generate strong random passwords
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Random password | Web Crypto API | ✓ Yes | Account security | Open → |
|
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JWT Decoder
Decode & inspect JWT tokens
|
Token inspection | JWT (RS256/HS256) | ✓ Yes | Auth debugging | Open → |
Explore Tools in This Category
MD5 & SHA Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes online. Free hash calculator for text strings.
Password Generator
Generate strong random passwords online. Customize length, characters, and complexity. Free and secure.
JWT Decoder
Decode and inspect JSON Web Tokens online. View header, payload, and expiration. Free JWT debugger.
Which Tool Should You Use?
Pick the right tool based on your specific use case:
Generate SHA-256 hash and compare with the published checksum.
Cryptographically secure random generation with customizable rules.
Decode header, payload, and check expiration without any server call.
Common Use Cases
- ✓ Generate MD5, SHA-1, SHA-256, or SHA-512 hashes for file integrity checks
- ✓ Create strong, random passwords with custom length and character sets
- ✓ Decode and inspect JWT tokens to debug authentication flows
- ✓ Verify API token expiration times without external tools
- ✓ Hash passwords locally before testing against APIs
Related Categories
See Also
Frequently Asked Questions
Is it safe to generate passwords in a browser-based tool?
Yes. Our password generator uses the Web Crypto API (crypto.getRandomValues) for cryptographically secure random generation. No passwords are sent to any server.
What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit hash and is fast but considered insecure for cryptographic purposes. SHA-256 produces a 256-bit hash and is the current standard for security applications.
Can I verify a JWT signature with this tool?
The JWT decoder shows the header, payload, and signature. For signature verification, you would need the secret key or public key, which our tool does not require — it focuses on inspection and debugging.
Try These Tools Now
All tools are free, run in your browser, and require no signup.