Hash Generator
What it is: Turn any text into a fixed-length "fingerprint" (hash), commonly used to check integrity.
When to use: When verifying a file/text was not modified, or storing a password digest.
Drop a file here, or click to select
Algorithm
Output Format
Everything runs locally in your browser — nothing is uploaded.
FAQ
What is a hash algorithm and what are its key properties?
A hash algorithm is a one-way function that maps arbitrary-length data to a fixed-length digest. Four key properties: ① Determinism — the same input always produces the same output; ② Avalanche effect — a tiny input change causes a completely different hash; ③ One-way — you cannot reverse-engineer the original data from the hash; ④ Collision resistance — it is computationally infeasible to find two different inputs with the same hash. Hash functions are used everywhere: file integrity, password storage, digital signatures, blockchains, and more.
Which hash algorithm should I choose?
MD5 (128-bit) is the fastest but has known collision vulnerabilities — only use it for non-security checksums. SHA-1 (160-bit) is deprecated and should not be used in new projects. SHA-256 is the current industry standard, widely used in TLS certificates, code signing, and Git commits. SHA-384 and SHA-512 offer higher security margins for post-quantum threat models. For security-sensitive work, always choose SHA-256 or stronger.