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Hash Calculator

Calculate a text or file checksum, then compare it with an expected hash. Your input stays in your browser.

Focus on this tool.

Choose your input

Text is encoded as UTF-8. A file is hashed as its original bytes.

Text to hashSpaces and line breaks count. Text is not trimmed or normalized. Limit: 1,000,000 characters.

Algorithm

Calculate all four algorithms from this input

Digest & comparison

Calculate a hash to display the digest here.

Result encoding

Calculated hash (hexadecimal)

Expected hash (hexadecimal, optional)Comparison always uses hexadecimal, even when the output is displayed as Base64. Letter case and surrounding whitespace are ignored.

What a matching hash does—and does not—show

A checksum comparison is useful only when the expected digest comes from a trustworthy source and uses the same algorithm. A match alone does not prove that a file is safe, identify its publisher, or scan it for malware.

This tool produces unkeyed digests, not encryption, signatures, or password storage. SHA-1 is offered only for legacy comparisons. Files are read directly in the browser; nothing is uploaded or stored by this tool.

Text-area line endings may differ from a saved file’s bytes. Use File mode when checking a published file checksum. An empty text input or a zero-byte file still has a valid digest.

Reference: Web Crypto digest documentation. Hashing requires Web Crypto in a secure context: HTTPS when published, or this local preview.

Calculated in your browser. Inputs and files aren’t uploaded or saved. Tool sources & licenses