What are MD5, SHA-1, and SHA-256?
They are hash algorithms that turn file contents into fixed-length checksums. MD5 and SHA-1 are faster but no longer suitable for security; SHA-256 is better for verifying downloads and detecting tampering.
Upload a file to calculate MD5, SHA-1, or SHA-256 checksums for downloads and integrity checks
Hashing in the browser can take longer than a command-line tool
They are hash algorithms that turn file contents into fixed-length checksums. MD5 and SHA-1 are faster but no longer suitable for security; SHA-256 is better for verifying downloads and detecting tampering.
Common uses include checking that a download is complete, comparing two files, and publishing checksums with software releases.
No. File reading and hashing run locally in your browser. Files are never uploaded.
Large files are read and hashed in chunks, so they take longer. Close other memory-heavy tabs and wait for the progress to finish instead of clicking again.
Different algorithms use different calculations and produce different lengths. Always compare using the same algorithm the publisher used.
SHA-1 is vulnerable to collision attacks and is not suitable for signatures or security checks. It can still be used for basic integrity checks, but SHA-256 is preferred.