Utilook

Text to hash

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Text is encoded as UTF-8 before it is hashed.

Hash algorithms

Choose one or more algorithms. SHA-256 is recommended for modern compatibility checks.

Hashes are created in your browser. Your text and results are never sent to Utilook.

Choose the right hash

Use SHA-256, SHA-384, or SHA-512 for modern integrity checks. MD5 and SHA-1 are included only when an older system requires them; do not use them to protect passwords or security-sensitive data.

A practical checksum workflow

Generate a SHA-256 value from known text and compare it character for character with the expected digest. Matching hashes provide strong evidence that the input is unchanged; a mismatch can result from one different byte, line ending, or text encoding.

Hashing is not encryption

A cryptographic hash is one-way and has no decryption key. It does not hide predictable input, and a plain fast hash is not a password-storage scheme; password systems need a dedicated slow, salted password-hashing function.

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Frequently Asked Questions

Are my text and hashes sent to a server?

No. This tool creates hashes in your browser and does not send your text or results to Utilook.

Which hash algorithm should I choose?

SHA-256 is a good default for modern integrity checks. Use SHA-384 or SHA-512 only when the receiving system specifically requires them.

Can I use MD5 or SHA-1 for passwords?

No. MD5 and SHA-1 are legacy algorithms and are not suitable for protecting passwords or security-sensitive data.

Why do small text changes produce a different hash?

Hash functions are designed so even a tiny change in the input produces a substantially different result.

What text encoding does this tool use?

The text is encoded as UTF-8 before hashing, so Korean and other Unicode text can be hashed consistently.