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Q & A Developer · September 11, 2026

What is the difference between bcrypt and Argon2?

Both are password hashing functions designed to be slow. bcrypt (1999) uses a modified Blowfish cipher, tunable via a single work factor. Argon2 (2015) uses a more modern design tunable across three dimensions: memory cost, time cost, parallelism. Argon2’s memory-hardness resists GPU-based cracking better than bcrypt. bcrypt is more battle-tested and universally supported. Recommendation for new projects: Argon2id (the hybrid variant). For existing bcrypt deployments: no urgent need to migrate — bcrypt at cost 12 remains secure. Generate either with the hash generator.

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What Is a JWT?
JWT (JSON Web Token) is the dominant format for API authentication, OAuth access tokens, and stateless session management. Three base64-encoded segments carry the header, claims, and signature — anyone can read them, but only the key holder can produce a valid token.
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