File Checksum Generator

Calculate a SHA-256 checksum for a selected local file.

Compare a browser-generated digest with a trusted published checksum.

Your inputs stay on your device

Generate a file checksum

live result

Local file

No file selected

The selected file is read only in this browser to calculate SHA-256. A checksum confirms matching bytes, not source trust.

Context & Reference

For comparing a local file with a published SHA-256 digest.

utility guide

Reads the selected file locally and uses Web Crypto to calculate its digest.

Use this utility with your own values, then review the clearly labelled result and copy it when you need it elsewhere.

The hexadecimal digest can be compared manually with a trusted source.

Select a download and compare its SHA-256 checksum.

A matching digest does not establish that the source is trustworthy.

This utility runs locally in this browser. A matching digest does not establish that the source is trustworthy.

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