Hash Generator
Calculate SHA-256, SHA-384 and SHA-512 for text, or SHA-256 for a file with Web Crypto.
The file is processed locally in your browser.
What this tool does
A cryptographic hash produces a fixed-length fingerprint of input data. Use it to compare a downloaded file with a trusted published checksum; a match is useful only when the reference comes from an authentic source. A hash is not encryption and cannot prove a file is safe.
How to use it
Enter the values requested by the calculator and check the result together with the notes shown below it.
Practical example
Use a realistic example from your own setup to compare scenarios. The result is a reference, not a replacement for manufacturer specifications.
How to interpret the result
Treat the result as an estimate whenever real-world factors are not available to the browser. For hardware, network or safety decisions, verify the relevant technical specifications.
Frequently asked questions
Can a hash be reversed?
Not directly: it is a one-way function. It is used to check data integrity, not to hide a text.
Is my file uploaded to a server?
No. The hash is calculated in your browser, so the content of the text or file never leaves your computer.