SHA-256 Online
Compute a SHA-256 checksum for text or a file, the default for integrity verification.
Hashing & encryption Client-side WebCrypto
Tool preview
How to use it
- 01
Choose text or file.
- 02
Provide the input.
- 03
Compute and copy the 64-character digest.
Limitations
- ! Files must fit in memory; very large files may fail.
- ! The digest proves integrity, not origin — a malicious sender can publish a matching hash.
FAQ
Where is SHA-256 commonly used?
Software release checksums, certificate signatures and password-derived keys.
Can two different files have the same SHA-256?
Not in practice; no collision has been found.
Does the tool keep a copy of the file?
No.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- WebCrypto
- Category
- Hashing & encryption
- Network requests
- None while processing