File Checksum Checker

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File Checksum Checker

Calculate and compare a local file SHA-256 checksum.

Developer Generators workspaceGeneration and hashing stay in your browser. HTTPS is required for secure cryptography.

Privacy-focused processingBrowser processing is used wherever practical.
25-minute cleanup policyServer files, when required, are removed after completion—not during active work.
Text, pasted data or supported local filesMaximum size and exact support are shown inside the tool.

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About This Tool

Calculate a local file SHA-256 digest and compare it to an expected hexadecimal checksum.

How to Use

  1. Choose a local file up to 50 MB.
  2. Optionally paste a 64-character expected SHA-256 value.
  3. Calculate and compare; then copy or download the report.

Tool Features

  • Local file hashing
  • SHA-256 comparison
  • Match/mismatch indicator
  • Copyable report

Common Use Cases

Everyday work

Complete repetitive formatting or calculation tasks.

Publishing

Prepare clean output for websites and documents.

Local review

Inspect and verify your result before downloading.

Supported Input and Output

Text, pasted data or supported local files

  • Check the tool workspace for its exact file-size limit.
  • Browser format support can vary by device and browser version.
  • Always review the generated result before important use.

Frequently Asked Questions

Does my file upload?

No. The browser reads and hashes it locally. The 50 MB limit helps prevent high memory use.

Security and Privacy Information

Local first

Supported processing runs inside your browser whenever practical.

Temporary files

When server processing is required, cleanup starts only after the work completes.

Your responsibility

Avoid uploading confidential data unless you understand the displayed processing notice.

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