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Webutilia
Integrity utility

Hash Calculator

Calculate SHA hashes for text or files and verify them against an expected checksum.

  • Free to use
  • No account
  • Browser processing
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Purpose-built workflow

Calculate and verify a text or file checksum

  • Text or file
  • Four SHA algorithms
  • Checksum verification
  1. InputEnter source or settings
  2. RefineChoose SHA algorithm and optional expected hash
  3. ReviewCompare calculated and expected values
  4. FinishCopy or download the checksum

Integrity utility

What does Hash Calculator do?

Hashes verify that a file or piece of text hasn't changed. This calculator produces SHA-1, SHA-256, SHA-384, and SHA-512 fingerprints for text and files.

Hashing runs locally using the browser's SubtleCrypto API, so your input is never uploaded.

Compute SHA-1, SHA-256, SHA-384, and SHA-512 hashes.
Paste an expected checksum to get a clear match or mismatch result.
Hash locally without uploading anything.

Common use cases

Verifying a downloaded file
Comparing file fingerprints
Generating a checksum for text

Step-by-step

How to use this tool

  1. 1

    Add content to Hash Calculator

    Enter the non-sensitive input or choose the generation settings.

  2. 2

    Configure the result

    Generate or calculate the result in your browser.

  3. 3

    Review and export

    Copy or download the output and store it appropriately.

Tips for a better result

  • Start with a representative sample before running a large hash calculator workflow.
  • Keep the original input until you have checked the downloaded or copied result.
  • Review quality, compatibility, and output size before publishing or sharing the result.

Keep working

Related workflows

All Security & Generators Generate secure passwords, identifiers, hashes, QR codes, and barcodes.Password Generator Create cryptographically random passwords with configurable character rules.UUID/GUID Provisioner Generate one or many cryptographically random UUID v4 identifiers.QR Code Blueprint Maker Encode URLs or text into a downloadable QR code graphic.Barcode Generator Render product numbers as downloadable industrial barcode graphics.

Learn from primary sources

Trusted references

Use these standards and official guides when you need deeper technical detail.

OWASP cryptographic guidance (opens in a new tab)Security guidance for random generation, hashing, encryption, and key handling.Web Crypto API reference (opens in a new tab)MDN's reference for cryptographic operations in the browser.

FAQ

Common questions

Everything you need to know before processing your files.

The SHA-1, SHA-256, SHA-384, and SHA-512 algorithms are supported via the browser's crypto API.

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Explore nearby tools in the same category to handle the next step in your workflow without starting over.

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Render product numbers as downloadable industrial barcode graphics.

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Privacy and measurement

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