Hash Generator
Type or paste any text to generate its MD5, SHA-1, SHA-256, or SHA-512 hash instantly. You can also hash a local file for checksum verification. All hashing runs entirely in your browser.
Hash a file instead
Select a local file to compute its hash — useful for verifying checksums. The file is never uploaded anywhere.
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Frequently Asked Questions
What is a hash?
A hash is a fixed-length string generated from input data using a mathematical function. The same input always produces the same hash, and any change to the input — even a single character — produces a completely different hash.
Is SHA-256 safe for passwords?
No. Use a dedicated password hashing algorithm such as bcrypt or Argon2 for storing passwords. SHA-256 is designed to be fast, which makes it unsuitable for password storage — a fast hash makes brute-force attacks easier.
Can I reverse a hash?
No. Hashing is a one-way function. You cannot mathematically recover the original input from its hash. Short or common inputs may be found via precomputed lookup tables (rainbow tables), which is why strong passwords matter.
What is MD5 used for?
MD5 is used for checksums and non-security integrity checks — for example, verifying that a downloaded file was not corrupted. It is cryptographically broken and must not be used for security-sensitive applications.