Client-Side File Checksum Verifier

Calculate SHA-1, SHA-256, SHA-512, and MD5 file hashes directly in the browser with zero upload
This free online client-side file checksum verifier runs in your browser and is part of our Cryptography collection.

Client-Side File Checksum Verifier

Calculate SHA-256, SHA-512, SHA-1, and MD5 file hashes directly in your browser. Verify downloaded file integrity and compare against official hashes with zero server upload.

📁 Click or Drag Any File Here Processed entirely on your device with Web Crypto API • Any file type & size

Why Verify Checksums?

  • Tamper & Malware Detection: If an attacker modifies an installation file, the cryptographic hash will completely change (Avalanche effect).
  • Download Corruption: Verifies that an ISO, zip, or large installer was not truncated or corrupted during download.
  • Complete Privacy: Everything runs using the browser's native `crypto.subtle` API — no data ever leaves your computer.

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