MD5 Hash Generator – MD5, SHA-1 & SHA-256 Online
Calcon's free Hash Generator computes MD5, SHA-1, and SHA-256 hashes from text or any file. All hashing runs in your browser using the crypto-js library — no data is uploaded to a server.
Hash Algorithm Reference
| Algorithm | Output Size | Status | Use For |
|---|---|---|---|
| MD5 | 128-bit / 32 hex | Deprecated (security) | File checksums, legacy |
| SHA-1 | 160-bit / 40 hex | Deprecated (security) | Git commit IDs, legacy |
| SHA-256 | 256-bit / 64 hex | Current standard | File verification, certificates |
Frequently Asked Questions
What is an MD5 hash?
MD5 produces a 128-bit hash (32 hex characters) from any input. The same input always produces the same hash. Even a tiny change in input produces a completely different hash. It is widely used for file integrity checksums but should not be used for security-critical purposes like password hashing.
MD5 vs SHA-1 vs SHA-256?
MD5 → 32 hex characters (128 bits). SHA-1 → 40 hex characters (160 bits). SHA-256 → 64 hex characters (256 bits). Longer output means a larger search space and more collision resistance. SHA-256 is the current recommended standard for security applications.
Can I use MD5 for password hashing?
No — MD5 and SHA-256 are too fast for password hashing. They can be computed billions of times per second on modern hardware. Use bcrypt, Argon2, or PBKDF2 for passwords — these are intentionally slow and salted to resist brute-force and rainbow table attacks.
How is file hash verification used?
Software providers publish the SHA-256 hash of their downloads. After downloading, you generate the hash of your file and compare it to the published value. A match confirms the file is intact and unmodified. This is standard practice for Linux ISOs, software installers, and security tools.
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