Hash Generator
Generate MD5, SHA-1, SHA-256 & SHA-512 hashes from text or files
What is Hash Generator?
A cryptographic hash function takes any input — a word, a sentence, a file — and produces a fixed-length string of characters called a hash or digest. Hash functions have three key properties: they are deterministic (the same input always produces the same hash), they are one-way (you cannot reverse a hash to get the original input), and they are avalanche-sensitive (a single character change produces a completely different hash).
Hash functions are fundamental to computer security and data integrity. MD5 produces a 128-bit (32-character hex) hash and is used for file integrity verification, though it is no longer considered cryptographically secure for passwords. SHA-1 produces a 160-bit hash — deprecated for security use but still encountered in legacy systems. SHA-256 is part of the SHA-2 family and is the industry standard for password hashing, digital signatures, and blockchain. SHA-512 provides even stronger 512-bit security.
Common uses include: verifying downloaded files haven't been corrupted (comparing hash checksums), storing passwords securely in databases (combined with salting), digital signatures in SSL certificates, blockchain transaction verification, and data deduplication. Altairys's Hash Generator computes all major hash algorithms instantly in your browser — your input text never leaves your device.
How to Use Hash Generator
- Enter your text or data
Type or paste any text, password, or string you want to hash.
- Choose hash algorithm
Select MD5, SHA-1, SHA-256, or SHA-512 based on your security needs.
- View the hash
The hash digest appears instantly and updates as you type.
- Copy the hash
Copy the hash string to use in your application or for verification.
Key Benefits
MD5, SHA-1, SHA-256, SHA-512 — all computed simultaneously.
All computation is local — your passwords and data never leave the browser.
Hashes update instantly as you type — no delays.
Generate keyed HMAC hashes for API authentication and message verification.
Frequently Asked Questions
For password storage, use bcrypt, Argon2, or PBKDF2 — these are purpose-built slow hash functions. SHA-256 is fast and suitable for data integrity but not ideal alone for password storage.
MD5 is not cryptographically secure — collisions (two different inputs producing the same hash) can be found. Use it only for checksums and non-security applications, not for passwords.
Not mathematically — SHA-256 is a one-way function. However, common passwords can be found in precomputed "rainbow table" databases. Always use salting when hashing passwords.
Encryption is two-way (you can decrypt with the right key). Hashing is one-way — you cannot get the original input back from a hash. Hashes are used for verification, not secrecy.
Download the file, calculate its hash with this tool, and compare it against the expected hash published by the software author. If they match, the file is authentic and uncorrupted.