Hash Generator
Hash Generator
Generate SHA-256, SHA-384, SHA-512 hashes.
Runs entirely in your browser
How to use this tool
- Fill in the inputs.
- Read the result.
- Copy or download as needed.
About the Hash Generator
The Hash Generator computes a cryptographic hash of any text you enter using the SHA-256, SHA-384, or SHA-512 algorithm, all of which are part of the SHA-2 family of hash functions widely trusted and used today for data integrity verification, digital signatures, and secure password storage systems.
A cryptographic hash function takes an input of any size and produces a fixed-length string of characters that acts as a kind of unique digital fingerprint for that exact input — even the smallest change to the input, like a single character, produces a completely different hash output.
The tool uses the Web Crypto API's `crypto.subtle.digest` function, a secure, standards-based hashing implementation built directly into modern browsers, to compute the hash of your input text using whichever SHA-2 algorithm you select. Your text is first converted into its raw byte representation, then passed through the selected hashing algorithm, and the resulting binary hash output is converted into a readable hexadecimal string for display.
Because the same input will always produce the exact same hash output with a given algorithm, hashes are useful for verifying that data has not been altered — for example, comparing the hash of a downloaded file against a published hash value to confirm the file was not corrupted or tampered with during transfer.
Common use cases
- Verifying that a downloaded file matches a publicly published hash value to confirm its integrity.
- Generating a hash of text data for use in a data integrity check within an application.
- Learning how cryptographic hash functions work by observing how small input changes produce completely different outputs.
- Creating a consistent, fixed-length identifier for a piece of text for use in a system that requires one.
- Comparing the output of different SHA-2 algorithm variants (SHA-256, SHA-384, SHA-512) for the same input.
Tips and best practices
- SHA-256, SHA-384, and SHA-512 are all currently considered cryptographically strong and are suitable for modern use, unlike older algorithms such as MD5 or SHA-1, which have known weaknesses.
- For password storage specifically, plain hashing (even with a strong algorithm like SHA-256) is not sufficient on its own — proper password storage requires a dedicated password-hashing algorithm with salting, such as bcrypt or Argon2.
- Hashing is one-way: there is no way to reverse a hash back into its original input, which is precisely what makes it useful for integrity verification rather than encryption.
- When comparing a file's hash to confirm integrity, make sure you are comparing the same algorithm's output — a SHA-256 hash cannot be meaningfully compared to a SHA-512 hash.
