Free Online File Hash & Checksum Calculator

Verify file checksums and compute SHA-256, SHA-512, and MD5 file digests in browser.

Cryptographic Checksums

SHA-256
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SHA-512
-
SHA-384
-
SHA-1
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Client-Side Guarantee: Processed 100% locally in your browser. No files or data are uploaded.

How to Use the Hash Calculator & Checksum

  1. Select or drop a file into the tool.
  2. The browser streams and computes hashes in real time.
  3. Paste expected hash to verify match.

Key Features

✓ Calculates SHA-256 and SHA-512 for local files
✓ Checksum comparison matcher
✓ Zero file uploads (streams via FileReader)
✓ Instant pass/fail badge

About Hash Calculator & Checksum

Drop any file to compute its SHA-256, SHA-512, or MD5 checksum directly in your browser. Compare against expected checksums with instant pass/fail verification.

Frequently Asked Questions

Are large files uploaded to calculate hashes?

No! Files are streamed in chunks locally via HTML5 FileReader API without uploading a single byte.

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