Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Hash Generator tool
Hash Generator: key facts
- What it does
- Generate MD5, SHA-1, SHA-256, SHA-512 hashes
- Category
- Security
- Cost
- Free, with no account, sign-up, or install.
- Your data
- Runs entirely in your browser — the files and text you enter are never uploaded to a server.
- Last reviewed
- . Report an incorrect result.
What the Hash Generator does
A hash is a fixed-length fingerprint of data — the same input always produces the same hash, but you cannot reverse it back to the original. This Hash Generator computes MD5, SHA-1, SHA-256, and SHA-512 hashes of any text, so you can verify integrity, compare values, or generate checksums.
Developers use it to verify that text or a value matches an expected checksum, to generate digests for caching keys, or to learn how the algorithms differ. You can compute several algorithms at once, have them update automatically as you type, and copy any result with a click.
Using the Hash Generator, step by step
- Type or paste your text into the input box.
- Select the hash algorithms you want — MD5, SHA-1, SHA-256, or SHA-512.
- Read the generated hashes, which update automatically as you type unless you turn that off.
- Toggle uppercase if you need it, and copy any hash to the clipboard.
Four algorithms, two implementations
SHA-1, SHA-256, and SHA-512 are computed through the browser's Web Crypto implementation, which is the platform's own optimised code. MD5 is computed by a JavaScript implementation included in the tool, because Web Crypto deliberately does not offer MD5 — its exclusion from the standard is itself a statement about the algorithm.
A cryptographic hash maps input of any length to a fixed-length digest, deterministically and irreversibly. The same input always produces the same digest; a single changed bit produces a completely different one, which is what makes hashes useful for detecting change.
Digest length is fixed by the algorithm, not by the input: hashing a word and hashing a novel both produce the same number of hexadecimal characters.
- MD5 produces 32 hex characters, SHA-1 produces 40, SHA-256 produces 64, and SHA-512 produces 128.
- Changing one character of the input changes roughly half the bits of the output.
- Hashing is one-way: the digest cannot be reversed to recover the input.
What makes this one worth using
- It generates four algorithms — MD5, SHA-1, SHA-256, and SHA-512 — side by side, so you can produce or compare several at once.
- The SHA family is computed with the browser's built-in Web Crypto API, giving correct, standard results.
- It auto-generates as you type and offers uppercase output, with one-click copy for each hash.
- Hashing happens entirely in your browser, so the text you hash is never transmitted.
MD5 and SHA-1 are broken, and hashing is not for passwords
MD5 has been practically broken since the mid-2000s: collisions — two different inputs with the same digest — can be produced in seconds, and this has been used to forge certificates. SHA-1 fell in 2017 with a demonstrated collision and has been withdrawn from certificate use. Neither should be relied on where an adversary might construct input. Both remain fine as non-security checksums against accidental corruption, which is the only reason to keep them available.
SHA-256 and SHA-512 are current and unbroken, and are the right default for integrity work.
Password storage is a different problem entirely, and general-purpose hashes are the wrong tool for it precisely because they are fast — an attacker with a stolen database can try billions of candidates per second on commodity hardware. Password hashing needs a deliberately slow, memory-hard, salted function: Argon2, bcrypt, or scrypt. Adding a salt to SHA-256 helps against precomputed tables but does nothing about the speed, so it is not a fix. And for verifying a message came from who you think, a hash alone is insufficient — that needs an HMAC or a signature.
Frequently Asked Questions
What is a hash used for?
Hashing turns data into a fixed-length fingerprint used to verify integrity (confirming a file or message has not changed), to compare values without storing the original, and as a building block in checksums and caching. It is one-way: you cannot recover the input from the hash.
Which hash algorithm should I use?
For integrity and general use, SHA-256 is the modern default. SHA-512 is stronger still. MD5 and SHA-1 are fast and fine for non-security checksums, but both are considered broken for security purposes and should not be used to protect passwords or signatures.
Is hashing the same as encryption?
No. Encryption is reversible with a key, so the original data can be recovered; hashing is one-way and cannot be reversed. Hashing verifies and fingerprints data, while encryption protects and later restores it.
Can I hash a file with this?
This tool hashes text you type or paste, not uploaded files. For checksums of text, configuration, or any string it works directly; to hash a file's contents, you would need a file-hashing tool instead.
