File Hash & Checksum
Calculate SHA-256, SHA-1, and MD5 checksums to verify file integrity.
100% Private & Client-Side
Your files are processed directly on your computer or phone. They are never uploaded to any remote server or stored anywhere.
Drop any file here to calculate its cryptographic hash
File stays in memory. Never sent to any server.
Browse DeviceHow to use File Hash & Checksum
Drag and drop any file (ZIP, ISO, installer, document).
The browser computes cryptographic hashes instantly.
Compare the generated hash against the original checksum.
Frequently Asked Questions
How is the hash calculated without uploading the file?
We use the browser's native Web Crypto API (SubtleCrypto) to stream and hash the file locally on your CPU.
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