Analyze a downloaded executable
file = (select any file)
Result: Full integrity report with hashes and entropy.
File Integrity Checker
Generate a comprehensive file integrity report by computing SHA-256, SHA-512, and SHA-3 hashes, calculating Shannon entropy, analyzing byte distribution, and displaying file metadata. All processing is local — nothing leaves your browser.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
What does entropy tell me?
Entropy measures randomness. Text files have lower entropy (~4-5 bits/byte), compressed or encrypted files have higher entropy (~7-8 bits/byte). Very high entropy does NOT prove a file is malware — it just indicates high randomness.
Why compute multiple hashes?
Different algorithms provide different hash lengths and security properties. Having multiple hashes lets you cross-reference and provides compatibility with different verification systems.
Is my file uploaded?
No. Everything is computed locally in your browser using the Web Crypto API.
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