Hash Generator
WEBGenerate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text.
Type some text above to generate a hash.
What is the Hash Generator tool?
This hash generator turns any text into its cryptographic fingerprint — pick MD5, SHA-1, SHA-256 or SHA-512 and the digest appears as you type. All four algorithms run in your browser: the SHA family uses the Web Crypto API and MD5 runs on a local JavaScript implementation, so whatever you hash is never uploaded, logged or seen by a server.
Typical jobs it handles in seconds: verifying that a downloaded file's published checksum matches the one you computed, checking whether two pieces of text are identical without comparing them character by character, generating a content hash for caching or deduplication, or reproducing the exact digest an API or tutorial expects. Switch algorithms with one tap — the output card shows which algorithm produced the digest and its bit length, from 128-bit MD5 up to 512-bit SHA-512 — and a copy button puts the full hash on your clipboard.
One thing worth knowing: a hash is one-way by design. You cannot decrypt an MD5 or SHA-256 hash back into the original text — sites that promise MD5 decryption are looking the hash up in giant tables of already-known values, not reversing the math. For new work, SHA-256 is the sensible default; MD5 and SHA-1 remain useful for legacy checksums but should not protect anything secret. The tool is free, needs no sign-up, and works on your phone as well as your desktop.
How to use the Hash Generator
- Type or paste your text into the input field — a string to fingerprint, a value to checksum, anything.
- Pick an algorithm chip: MD5, SHA-1, SHA-256 or SHA-512.
- The digest updates live below the input, labelled with the algorithm and its bit length.
- Tap copy to put the full hash on your clipboard.
- Switch chips to hash the same text with a different algorithm — the output recalculates instantly.
Frequently asked questions
Can you decrypt an MD5 or SHA-256 hash?
No — hashing is one-way, so there is no mathematical way to recover the original text from a digest. Sites offering MD5 «decryption» are really doing a lookup: they keep enormous tables of pre-computed hashes for common words and passwords and match yours against them. A hash of long, unique input cannot be looked up that way.
Which hash algorithm should I use?
SHA-256 is the modern default for checksums, integrity checks and content addressing; SHA-512 gives a longer digest if a system asks for it. MD5 and SHA-1 are cryptographically broken — fine for quick non-security checks and legacy formats, but never for anything an attacker might target.
What is the difference between MD5 and SHA-256?
MD5 produces a 128-bit digest and has known collision attacks — two different inputs can be crafted to share one MD5 hash. SHA-256 produces a 256-bit digest with no practical collisions known, which is why it is the standard for file verification, digital signatures and blockchains. Use MD5 only when an existing system requires it.
Is hashing the same as encryption?
No. Encryption is reversible with the right key — the data comes back. A hash is a fixed-size, one-way fingerprint: the same input always gives the same digest, and there is no key that turns the digest back into the input.
Is my text uploaded when I hash it?
No. The SHA digests are computed by your browser's built-in Web Crypto API and MD5 by a local script — everything stays on your device. Once the page has loaded, it even works offline.
Is it free, and is there a length limit?
Free with no sign-up and no quota. There is no fixed input limit — very large texts are constrained only by your browser's memory.
Why does the same text always produce the same hash?
Because hashes are deterministic — that is the whole point. A stable fingerprint lets you confirm that a file or message has not changed: if even one character differs, the digest changes completely.
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