Hash Generator
A hash function is a mathematical algorithm that transforms data of arbitrary size into a fixed-length string. The result (hash) is unique for each input: even a minimal change in the source data completely changes the hash. This tool computes hashes simultaneously in four algorithms: MD5, SHA-1, SHA-256, and SHA-512.
Where Hashes Are Used Hashes are used for file integrity verification (checksums), secure password storage, digital signatures, and data deduplication. MD5 (128-bit) and SHA-1 (160-bit) are considered deprecated for cryptographic purposes but are still used for checksums. SHA-256 and SHA-512 from the SHA-2 family are current security standards.
Free online tool for generating cryptographic hashes. Enter any text and instantly get its hashes in all popular algorithms: MD5, SHA-1, SHA-256, and SHA-512. All hashes are computed simultaneously and update in real time as you type.
Hash functions are one-way mathematical transformations that convert input data of arbitrary length into a fixed-length string. They are widely used for file integrity verification, password storage, digital signatures, and checksums. MD5 (128-bit) and SHA-1 (160-bit) are considered deprecated for cryptographic purposes but are still used for checksums. SHA-256 and SHA-512 from the SHA-2 family are current security standards.
SHA algorithms use the browser's built-in Web Crypto API for high performance and accuracy. MD5 is implemented in pure JavaScript. Each hash can be copied to the clipboard with a single click. Useful for developers, testers, and information security specialists.
How to use it
- Type or paste text — MD5, SHA-1, SHA-256 and SHA-512 are computed on the fly with every change.
- Copy the value you need with one button. The hex case can be toggled.
- Text is processed as UTF-8, so the result matches md5sum and sha256sum for the same file in that encoding.
When it helps
- Integrity checks: compare the checksum of a downloaded file or configuration with the published one.
- Debugging: make sure your code hashes the same way another system does, for example when signing API requests.
- Identifiers: derive a stable cache key or file name from a string.
Frequently asked questions
Can I store passwords as SHA-256?
No. Fast hashes can be brute-forced at billions per second. For passwords use bcrypt, scrypt or Argon2 with a salt.
Are MD5 and SHA-1 still safe?
Not for cryptography — collisions have been found for both. They are fine for checksums and compatibility with legacy systems. For new work use SHA-256.
Why does the hash of the same text differ from another site?
Most likely the encoding or invisible characters differ: a trailing newline, a BOM, whitespace. A single byte changes the hash completely.