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PDF Checksum

Security

Compute SHA-256, SHA-1, or SHA-512 hashes of any PDF (or any file) right in your browser using WebCrypto. Verify downloads and detect tampering.

📄

Drop files here or click to browse

Drop any PDF (or any file) to hash it locally.

🔒 100% Private

Files never leave your browser. No upload to any server.

⚡ Instant

Processing runs locally on your device. No queues, no waiting.

🆓 Free Forever

No signup, no watermarks, no limits. Use as many times as you like.

Frequently asked questions

Which algorithm should I use?

SHA-256 is the modern standard. SHA-1 is provided for legacy compatibility only. SHA-512 offers extra collision resistance.

Does this upload my file?

No — hashing happens locally in your browser using the WebCrypto API.