SHA-256 vs bcrypt — Which Should You Use?

SHA-256 Hash GeneratorGenerate secure SHA-256 hashes from text or files.Open tool bcrypt Password HasherGenerate secure bcrypt hashes for passwords.Open tool

SHA-256 and bcrypt are both hash functions, but they solve opposite problems. SHA-256 is a fast checksum. The same input always gives the same digest, which makes it perfect for integrity. bcrypt is a slow, salted password hash. Every run gives a different result, which makes it right for storing secrets. Pick by job: fingerprints and file verification want SHA-256; anything meant to resist offline guessing wants bcrypt.

Use SHA-256 when

  • You need a checksum or fingerprint: file integrity, content addressing, or verifying a payload wasn't altered.
  • You must match an existing spec or protocol, where the exact digest format matters.
  • You want a fast, fixed-size digest (64 hex chars) regardless of input length.
  • You need to detect accidental corruption, not resist an attacker guessing a password.

Use bcrypt when

  • You're storing passwords or secrets that must survive offline brute-force attacks.
  • You want per-user random salts so identical passwords never hash alike.
  • You can tune the workload. Raise the cost factor as hardware gets faster.
  • You need an adaptive hash you can re-hash and compare by running the check again.

Side by side

SHA-256 Hash Generatorbcrypt Password Hasher
PurposeFast integrity checksumSlow password hash
SaltNone, deterministicRandom, embedded in every hash
Same input twiceIdentical digestDifferent hash each time
Output64 hex chars60-char string ($2b$10$…)
SpeedFast by designDeliberately slow (2^cost rounds)
Best forFiles, payloads, fingerprintsPasswords, secrets, tokens
Where it runsBrowser, no uploadBrowser, no upload
under the hood

Using a fast hash like SHA-256 on passwords lets attackers test billions of guesses per second. bcrypt is slow by design and salted per hash. Neither tool uploads your input; both run entirely in the browser.

bottom line

Reach for SHA-256 when you need a fast, repeatable checksum: verifying files, payloads, or that nothing changed in transit. Reach for bcrypt when the input is a password or secret that an attacker might try to guess: its salt defeats precomputed tables, and its tunable cost makes each guess expensive. When in doubt, integrity work → SHA-256, credential storage → bcrypt.

Open SHA-256 Hash Generator Open bcrypt Password Hasher
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