What does File Hash Calculator actually do?

The file hash tool reads a file in the browser and prints its digest. The bytes include whatever is in the file, not a pretty-printed copy. Two files that look identical in an editor can hash differently if line endings differ. The file is not uploaded to DevTooKit.

When should I use File Hash Calculator?

Use it to reproduce a published checksum of a download.

When should I not use File Hash Calculator?

Do not hash a password by saving it into a file and comparing to a bcrypt string. Different constructions.

What does File Hash Calculator not do?

Hashing a file is not the same as hashing the text you would paste. Very large files are limited by the tab’s memory.

File Hash Calculator

Drag a file in and compute MD5, SHA-1, SHA-256, SHA-512, Blake3 checksums. Free online — runs locally, no upload.

Drop a file here, or click to browse

Files never leave your browser — all hashing is local.

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File Hash Calculator