Hash Generator
Compute MD5, SHA-1, and SHA-256 hashes of any text, updated as you type.
Last updated
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How to generate a hash
- Type or paste text.
- The MD5, SHA-1 and SHA-256 hashes update as you type.
- Click Copy beside the one you need.
About these hashes
A hash function turns input of any length into a fixed-length fingerprint — the same input always produces the same hash, and even a one-character change produces a completely different one. SHA-1 and SHA-256 are computed with the browser's native crypto.subtle.digest, part of the Web Crypto API, so results match any standard implementation exactly.
MD5 isn't supported by crypto.subtle — modern browsers dropped it because it's cryptographically broken — so this tool uses a small, well-tested JavaScript implementation for it instead. MD5 and SHA-1 are fine for checksums and cache keys, but neither should be relied on for security purposes like password storage or verifying that a file hasn't been tampered with by an adversary; SHA-256 is the safer choice there.
All hashing happens locally in your browser — the text you enter is never sent anywhere.
Questions about hashes
What is a hash?
A fixed-length fingerprint of some data. The same input always gives the same hash, and changing a single character gives a completely different one.
Can a hash be reversed?
Not directly. But short or common inputs can be found by guessing, which is why plain hashes aren’t safe for storing passwords.
Which hash should I use?
SHA-256 for anything security-related. MD5 and SHA-1 are broken for security but still fine for checksums and cache keys.
How do I hash a file?
Use the file hash checker, which hashes files of any size in your browser and compares them with a published checksum.