โ Frequently Asked Questions โ Hash Generator
What is a hash and what is it used for?
A hash is a fixed-length string produced from any input using a one-way mathematical function. The same input always produces the same hash, but you cannot reverse a hash to get the original input. Hashes are used to verify file integrity (check if a file was corrupted or tampered), store passwords securely (only the hash is saved, not the actual password), create digital signatures, and in blockchain technology.
What is the difference between MD5, SHA-1 and SHA-256?
MD5 produces a 128-bit hash (32 hex characters). It is fast but has known collision vulnerabilities โ two different inputs can produce the same hash. SHA-1 produces a 160-bit hash (40 hex characters) and is also considered broken for cryptographic security. SHA-256 (part of SHA-2 family) produces a 256-bit hash (64 hex characters) and remains cryptographically secure for most applications. SHA-512 is even stronger at 512 bits.
Can I hash files with this tool?
Yes. Drag and drop any file into the File Hash section. The tool reads the file in your browser, generates the hash, and displays it. This is useful for verifying download integrity โ compare the hash of a downloaded file against the official hash published by the software developer to confirm the file is authentic and unmodified.
Is this tool safe to use for sensitive data?
All hashing runs in your browser using the Web Crypto API for SHA algorithms and a pure-JS implementation for MD5. Nothing is sent to any server. However, avoid hashing actual passwords in a browser tool โ use proper server-side password hashing libraries (like bcrypt, Argon2) for real security applications. This tool is ideal for checksums, file verification and learning.