SHA-1 Generator
Generate SHA-1 hashes locally for text or files. No uploads, no tracking.
Input
SHA-1 hash
File
Drop a file here or click to upload
Runs locally. For very large files, hashing may take a moment.
No file selected
SHA-1 hash
Your data never leaves your browser. No uploads. No tracking.
Legacy compatibility
Generate SHA-1 checksums for older systems and archival workflows.
Offline by design
Hashing happens in your browser with the Web Crypto API. Nothing is sent or stored.
Copy or compare
Switch between lowercase and uppercase outputs to match published checksums quickly.