File Checksum | 100tools

Stream any local file in a background worker, with progress and cancellation. Paste an expected hash to compare. MD5 and SHA-1 are for compatibility checks, not security signatures.

Choose local files

Algorithm

Expected hash (optional)

Files stay on this device. Nothing is uploaded.

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Frequently Asked Questions

Do I need to log in or upload my data?

No. Processing runs in your browser; input and files are not sent to a backend. Loading the website and program assets requires a connection.

Which formats and rules are supported?

The file is read in 1 MiB chunks in a background worker, with cancellation. MD5 and SHA-1 are compatibility checks, not secure signatures.