Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Frequently Asked Questions
What does the hash generator do?
A hash function maps input of any length to a fixed-length digest. DevToolkit's hash generator computes common algorithms — MD5, SHA-1, SHA-256, SHA-512 — in parallel from a single input, so you can compare results side by side.
What are common use cases for hashing?
File integrity checks (compare the SHA-256 of a download), password storage (with a salt), data fingerprints (cache keys, deduplication), blockchain and signatures, API idempotency keys, and short IDs. Remember: hashing is not encryption and cannot be reversed.
Are MD5 and SHA-1 still safe to use?
Both have practical collision attacks and should no longer be used for security-sensitive purposes (password storage, digital signatures, certificates). They remain fast and fine for non-adversarial uses such as file checksums and cache keys. For anything security-critical, use SHA-256, SHA-512, or the SHA-3 family.
Why does the same text always produce the same hash?
Hashing is deterministic — identical input yields identical output. That is also why raw hashing is not enough for passwords: attackers can precompute rainbow tables. For password storage, use a slow, salted algorithm like bcrypt, argon2, or scrypt.
Is my data uploaded? How large a file can you hash?
Nothing is uploaded. Text and small files are hashed locally. Browsers set practical memory limits on very large files — multi-gigabyte files are best handled by a desktop tool, but everyday files up to tens of MB work smoothly.
What is the difference between hashing, encryption, and signing?
Encryption (e.g., AES) is reversible with a key. Signing uses a private key to prove origin and detect tampering. Hashing is a one-way digest with no key involved. In practice they are combined — HMAC mixes a key with a hash, and signature algorithms call a hash internally.