Generate
SHA-256 Hash
Wrap long lines in the input and output
Text
Paste text to hash, or leave the box empty for the digest of zero bytes.
Hex digest
Generate
Paste text to hash, or leave the box empty for the digest of zero bytes.
SHA-256 hashes the UTF-8 bytes of everything you paste and prints 64 hex characters. An empty box is the digest of zero bytes, not a blank result.
Uppercase hex writes the same digest with A-F. Leave it off for the usual lowercase form used by most checklists.
MD5 is not available because WebCrypto does not offer it. SHA-1, on its own page, is only for checking old systems. Use SHA-256 for a new checksum.
The whole input, as UTF-8 bytes, including accents and emoji. The output is 64 hex characters. An empty box is the digest of zero bytes.
WebCrypto does not offer MD5, so this page does not compute one. Use SHA-256 for new checks. SHA-1 is only for checking old systems.
It prints the same digest with A-F instead of a-f. Turn it on when the value you are comparing uses capital letters.
No. This runs in your browser and the text you paste is never uploaded, logged or stored. Google Analytics records page views and feature use, never content.
Compute a SHA-512 message digest from any text in your browser. The longer hex updates as you type, and your text is never uploaded.
Check a SHA-1 digest against old systems in your browser. Use it only to compare legacy hashes, and your text is never uploaded.
Sign a message with HMAC-SHA256 in your browser. Put the key on the first line, then the text, and your text is never uploaded.
Generate placeholder words, sentences or paragraphs.
Generate version-4 UUIDs from cryptographic random bytes.
Encode text as a QR code and show it as an image.
Turn text into a valid JSON string literal, or decode one back to plain text.
Iternal · AI Blueprint Builder
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