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Checksum Generator
Generate file checksums using MD5, SHA1, SHA256, and more.
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Frequently asked questions
Why is MD5 handled differently from the other algorithms?
Browsers' built-in Web Crypto API deliberately excludes MD5 since it's considered broken for security use, so this tool ships a small pure-JavaScript MD5 implementation just for checksum comparison, while SHA-1/256/512 use the native crypto.subtle.digest.
How does "Verify Checksum" work?
Paste any hash and it's compared (case-insensitive, trimmed) against all four computed hashes at once — it tells you which algorithm matched, without you needing to pick one first.
Is the file uploaded anywhere to compute the hash?
No — the file is read into memory in your browser and hashed locally; it's never sent to a server.
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