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Android source safety · Learning resource

How to verify downloads with SHA-256

Learn to calculate a file checksum locally on Android, Windows, macOS or Linux and compare it with an independently verified reference from the publisher.

How to use this guide: This educational text was prepared with AI assistance and reviewed against the linked reference materials. It is not a software security certification, an approved translation, or a substitute for checking the current official instructions. Report corrections by email.

What is SHA-256?

SHA-256 is a fingerprint of a file. A 64-character digest helps you compare downloaded bytes against a trusted reference. A matching hash does not establish that a file is safe, malware-free, or produced by a legitimate developer.

Calculate a hash in your browser

Choose a file up to 32 MiB. This local Web Crypto tool does not upload the file. To compare, optionally paste the checksum from a trusted publisher; otherwise copy the result and compare separately.

Local SHA-256 calculator

Choose a file. Processing stays on your device.

A checksum match is an integrity check, not proof of authenticity or a security audit. Confirm the reference independently.

Desktop commands for larger files

Substitute your actual filename for download.zip.

Windows PowerShell

Get-FileHash -Algorithm SHA256 "download.zip"

macOS

shasum -a 256 download.zip

Linux

sha256sum download.zip

How to interpret the result

If hashes differ, recheck your file and the publisher's source. Do not execute it until the difference is resolved. Even matching hashes do not prove a download is trustworthy. Review the source, software signatures and permissions.

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