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SHA-256 File Hash

Compute the SHA-256 checksum of any file.

What Is a SHA-256 File Hash?

The SHA-256 File Hash tool computes the SHA-256 checksum of any file directly in your browser. This is commonly used to verify file integrity, confirm that a download matches its published checksum, and detect accidental corruption during transfer. All processing happens locally in your browser, so your files never leave your device. This free online tool is useful for SHA-256 file hash, SHA256 checksum generator, file checksum online. Common use cases include download verification, software releases, backups, firmware, and file integrity checks. It is designed for quick browser-based hashing, encoding, decoding, encryption testing, checksum comparison, identifier generation, and cryptography education. For production security, follow the algorithm's current standards, key-management requirements, and application-specific security guidance.

How to Use This SHA-256 File Hash

  1. 1
    Select the fileChoose the local file whose checksum you want to calculate.
  2. 2
    Process locallyThe browser reads the file and computes the requested digest without uploading the file.
  3. 3
    Review the checksumCompare the generated hexadecimal digest with the trusted checksum you need to verify.
  4. 4
    Check the sourceFor downloads, use a checksum published by the official software or file provider.
  5. 5
    Copy the resultSave the checksum for your verification record or comparison.

Frequently Asked Questions

No. The file is read and hashed entirely in your browser using the Web Crypto API. Your data never leaves your computer.
Checksums let you verify that a file has not been corrupted or tampered with. If the computed hash matches the one published by the provider, the file is almost certainly intact.
Yes. The file is streamed into the browser's crypto digest in chunks, so even large files can be hashed reliably, though very large files may take a moment.