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Pure Client-Side File Checksum Verifier

Security Crypto

Compute SHA-256, SHA-1, and MD5 checksums for files in-browser — verify downloads against published digests without uploading anywhere.

Client-side

File inputs

Drop files to hash

SHA-256, SHA-1, and MD5 — streamed locally in 2 MB chunks

Expected checksum (optional)

Optional — paste a known SHA-256, SHA-1, or MD5 digest to verify.

Pure client-side file integrity

Stream files through SHA-256, SHA-1, and MD5 digests without uploading bytes to a server. Paste a published checksum to verify downloads, firmware, or release artifacts.

SHA-1 and MD5 are legacy algorithms — fine for file integrity checks against published digests, but do not use them for new cryptographic security designs.