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Checksum Calculator
Compute three real checksums at once — CRC32, MD5, and SHA-256 — for the same input text.
How to Use Checksum Calculator
- 1Paste your text
- 2Click Process
- 3Copy the CRC32, MD5, and SHA-256 checksums shown
Frequently Asked Questions
Yes — CRC32 via a standard polynomial implementation, MD5 via this site's own RFC 1321 implementation, and SHA-256 via the native Web Crypto API. None of them are approximated or faked.
Match whichever the file's publisher provided — SHA-256 is the modern standard for integrity verification, MD5 is still common for quick de-duplication checks, and CRC32 is common for error-detection in archives (like ZIP files).
Just the text you paste into the input box — there's no file upload here, so to checksum a real file, use a local command-line tool (like `certutil -hashfile` on Windows or `shasum`/`md5sum` on macOS/Linux) instead.
No — all three checksums are computed entirely in your browser.
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