Security Tools
Free Online Security Tools
Generate strong passwords, inspect JWTs, hash strings, and encode URLs with FYNTools security helpers. Ideal for developers and learners — not a substitute for enterprise security products.
5 tools
All Security Tools
Hash Generator & Comparator
Generate and compare cryptographic hashes using MD5, SHA-1, SHA-256, and SHA-512 algorithms. Verify encrypted data by comparing plain text with hash values.
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Password Generator
Generate strong and secure passwords.
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JWT Token Decoder
Decode and parse JWT (JSON Web Token) headers, payloads, and signatures.
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URL Encode Decode
Encode URLs for safe transmission or decode URL-encoded strings instantly.
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Base64 Converter
Encode and decode Base64 strings.
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Security Tools FAQ
Quick answers for people browsing this category. Open any tool above when you are ready to run a conversion, lookup, timer, or typing session in your browser—no install required.
- Should I paste production JWTs here?
- Prefer local decoding for sensitive tokens. Use sample/expired tokens when learning.
- Are generated passwords stored?
- Password generation is designed to run in-browser; copy results and close the tab on shared machines.