Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic hashes from text or files — instantly, privately, entirely in your browser.
Algorithm
Text Input
How to generate a hash
- Choose an algorithm — SHA-256 is recommended for most uses.
- Paste your text into the input area, or upload a file to hash.
- Click Generate Hash.
- Copy the hex digest with the Copy button.
What is a cryptographic hash?
A cryptographic hash function maps arbitrary data to a fixed-length hex string. The same input always produces the same output, but the function is one-way — you cannot reverse a hash to get the original input. SHA-256 is widely used for checksums, data integrity, digital signatures, and password storage.
Privacy — computed in your browser
All hashing uses the browser's native Web Crypto API (crypto.subtle.digest). No data is sent to any server. Your text and files never leave your device.
Frequently Asked Questions
Which algorithm should I use?
SHA-256 is the most widely used and recommended for checksums and data integrity. SHA-512 offers a longer digest. SHA-1 is considered weak for security use cases and should be avoided for cryptographic purposes.
Can I verify file integrity with this?
Yes — upload a file and compare the SHA-256 output against the checksum published by the file provider. If they match, the file is unmodified.
Is this the same as MD5?
MD5 is a different (older, weaker) algorithm not supported by the Web Crypto API. SHA-256 is far more secure and should be preferred in any new application.
Can I reverse a hash to get the original text?
No. Cryptographic hash functions are one-way. It is computationally infeasible to recover the original input from the hash output.