SHA-256 is widely used and faster; SHA-512 produces a longer digest with a larger internal state.

Is this the same as File Checksum tool?

Hash Generator handles text and files; File Checksum focuses on files and shows read progress.

Why is my file hash slow?

Large files must be read entirely; progress indicates read status before digest completes.

Hash Generator

Calculate SHA-256 and SHA-512 checksums for UTF-8 text and local files directly in your browser.

Files and content are processed locally in your browser and are not uploaded to our server.

About this tool

Calculate a cryptographic checksum for text or files directly in your browser. Choose SHA-256 or SHA-512, copy the hexadecimal result, and compare it with a known checksum to confirm that a file has not changed.

How to use

SHA-256 and SHA-512 algorithms
Calculate a checksum for UTF-8 text instantly
Calculate a checksum for local files with progress for large inputs
Hex-encoded result output
Cancel long-running file calculations
Pick input type: Enter text or select a file from your device.
Select algorithm: Choose SHA-256 (common) or SHA-512 (stronger).
Copy result: Copy the hexadecimal result for comparison or logging.

Examples

Check a downloaded file against a checksum provided by its publisher
Compare whether two versions of a file are identical
Create a hash for a document
Prepare a value for testing HMAC input

Limitations

Very large files are read fully into memory before the checksum is calculated
Only SHA-256 and SHA-512 are available in this tool
The entered text or selected file is processed directly in your browser and is not sent to a server.

FAQ

SHA-256 vs SHA-512?: SHA-256 is widely used and faster; SHA-512 produces a longer digest with a larger internal state.
Is this the same as File Checksum tool?: Hash Generator handles text and files; File Checksum focuses on files and shows read progress.
Why is my file hash slow?: Large files must be read entirely; progress indicates read status before digest completes.