Hash Generator (MD5, SHA-256)
Hash text or entire files with Web Crypto (plus MD5 for legacy checksums). Secrets never leave your device.
File
Drop a file to checksum
SHA-256 & MD5 online — no upload
Reddit developers warn against pasting secrets into random hash sites. This calculator uses Web Crypto (and MD5 for legacy checksums) entirely in your browser—hash text or whole files without leaving the device.
Frequently asked questions
Is MD5 secure for passwords?
No. Use SHA-256/512 for integrity checks; use a password manager and proper KDFs for passwords. MD5 remains useful for non-security checksums.
Can I hash a file?
Yes—drop a file and we hash its bytes locally with FileReader + Web Crypto.
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