Hash Generator - Local SHA-256 & Checksum Tool

Generate SHA-256, SHA-384, SHA-512 hashes and file checksums locally in your browser. Compare expected values, copy results, and verify files without uploads.

Click for theater mode

Hash Result

Ready

How to Use

  1. Choose text mode or file mode.
  2. Paste text, or select a file to verify.
  3. Pick SHA-256, SHA-384, or SHA-512.
  4. Paste an expected checksum if you need comparison.
  5. Copy the generated result.

Core Features

  • Text and file hashing: Paste text or choose a file to generate a verifiable fingerprint.
  • Checksum compare mode: Paste an expected checksum to verify downloads, release artifacts, or config payloads.
  • Modern SHA algorithms: Use SHA-256, SHA-384, and SHA-512 without presenting MD5/SHA-1 as secure choices.
  • Local privacy workflow: Text, payloads, and files are processed in your browser without uploads.
  • Fast copy output: Copy hashes into release notes, audits, or debugging workflows.

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Calculation Logic

A hash turns input data into a fixed-length fingerprint. This tool uses the browser Web Crypto API locally:

  • SHA-256/SHA-384/SHA-512 are useful for integrity checks, release verification, and developer workflows.
  • A checksum proves whether content matches; it is not encryption and cannot restore the original input.
  • Compare mode ignores spaces, colons, and hyphens to support pasted checksum formats.
  • Files are read and hashed in the browser without upload.

FAQ

Is my text or file uploaded?

No. Hashing runs locally in your browser, and the input is not uploaded to a server.

Is a hash the same as encryption?

No. A hash is a one-way fingerprint for integrity checks. Encryption is reversible when you have the key.

Which algorithm should I use?

Use SHA-256 for most checksum work. Use SHA-384 or SHA-512 when you need a longer digest.

Can I verify a downloaded file?

Yes. Select the file and paste the official checksum to see whether it matches.

Why do two files have different hashes?

Any small change in content, encoding, or metadata can produce a different hash. That is why checksums are useful for detecting changes.

Why is MD5 not included?

MD5 is no longer suitable for security-sensitive claims. This first version focuses on modern SHA algorithms.