Hash Generator
Generate SHA-256, SHA-1, and SHA-512 hashes from any text — entirely in your browser.
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Results are for general guidance only — not professional advice. Learn more.
How to use this tool
Type or paste any text into the input field. SHA-256, SHA-1, and SHA-512 hashes are generated instantly in your browser using the Web Crypto API — no data is sent to any server.
- SHA-256: The recommended general-purpose hash. Use this for checksums, integrity verification, and most security applications.
- SHA-1: An older algorithm shown for reference. Do not use for security-critical purposes — it is deprecated.
- SHA-512: A stronger variant producing a 128-character hash. Useful when additional collision resistance is needed.
- Click Copy next to any hash to copy it to your clipboard.
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Frequently asked questions
What is a hash function?
A hash function is a mathematical algorithm that converts any input (text, files, data) into a fixed-length string of characters called a hash or digest. The same input always produces the same hash, but even a tiny change in input produces a completely different hash. Hashes are one-way — you cannot reverse a hash back to the original input.
What is SHA-256 used for?
SHA-256 (Secure Hash Algorithm 256-bit) is widely used for data integrity verification, digital signatures, password storage (with salting), and blockchain technology. It produces a 64-character hexadecimal string and is considered cryptographically secure for most current applications.
Is SHA-1 still secure?
SHA-1 is no longer considered cryptographically secure for sensitive applications. In 2017, researchers demonstrated the first practical SHA-1 collision attack. It should not be used for digital signatures, certificates, or security-critical purposes. SHA-256 or SHA-512 are the recommended alternatives.
What is the difference between hashing and encryption?
Hashing is a one-way process: you can convert data to a hash but cannot reverse it. Encryption is two-way: data can be encrypted and then decrypted with the correct key. Hashing is used to verify integrity and store passwords; encryption is used to protect data that needs to be recovered later.