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SECURITY

Hash Comparison Tool

Compare two hashes with smart normalization and a character-level diff, check a hash against live-computed text hashes, or dedupe a whole pasted list.

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What this tool does

Three related ways to work with hashes beyond generating them: comparing two hash strings directly with normalization and a character diff, checking a hash against a piece of text by hashing that text live with every common algorithm, and deduplicating a whole pasted list of hashes at once.

Compare Two: smart normalization

Hashes get written in different formats depending on the tool that produced them -- colon-separated hex (AB:CD:EF...), a 0x prefix, mixed case, or stray surrounding whitespace. This tool strips all of that before comparing, so ab:cd:ef and 0xABCDEF are correctly recognized as the same value instead of failing a naive string comparison over formatting differences that don't actually matter.

Character-level diff

When two hashes of the same length don't match, every character is compared individually and the first mismatching position is called out directly -- far faster than scanning two 64-character hex strings by eye looking for the one character that's different.

Hash vs Text: compute and compare in one step

Have a hash and a guess at what produced it? Paste both -- the text is hashed live with MD5, SHA-1, SHA-256, SHA-384 and SHA-512 simultaneously, and whichever one matches your pasted hash is highlighted directly, without needing to flip back and forth to a separate hash generator and copy-paste the result.

Algorithm auto-detection by length

A normalized hash's length is a strong hint at its algorithm -- 32 hex characters is almost certainly MD5, 40 is SHA-1, 64 is SHA-256, and so on -- shown automatically next to each input so you know what you're looking at even without being told.

Batch list dedupe

Paste a whole list of hashes (one per line, optionally with a label before a colon or whitespace) and get every duplicate grouped together -- useful for spotting repeated file hashes in a directory listing, or cleaning up a manifest before publishing it.

Why this is separate from the File Hash Calculator

That tool hashes actual files and can check one result against one expected value. This tool works purely with hash strings you already have -- comparing two, checking one against arbitrary text, or deduplicating a whole list -- which doesn't require a file at all.

Privacy

Every comparison, diff and hash computation happens entirely in your browser. Nothing is uploaded.

FAQ

Frequently asked questions

Why would two hashes look different but actually be the same value?
Formatting -- colon separators, a 0x prefix, different casing, or stray whitespace are all common depending on which tool produced the hash. This tool strips all of that before comparing, so formatting differences don't cause a false mismatch.
What does the character-level diff show?
When two same-length hashes don't match, it compares them position by position and reports the first character where they actually disagree -- much faster than visually scanning two long hex strings for the one different character.
How does "Hash vs Text" know which algorithm to use?
It doesn't guess -- it computes the text's hash with every common algorithm (MD5, SHA-1, SHA-256, SHA-384, SHA-512) at once and highlights whichever one matches your pasted hash, so you don't need to already know which algorithm produced it.
How accurate is the algorithm guess by length?
It's a strong hint, not a certainty -- 32 hex characters is almost always MD5 but could coincidentally be something else with the same output length. Use "Hash vs Text" if you need to actually confirm which algorithm produced a given hash.
What does the batch dedupe mode actually find?
It groups identical hash values appearing more than once in a pasted list -- useful for spotting duplicate files in a hash manifest, or catching an accidental repeat before publishing a checksums file.
How is this different from the File Hash Calculator?
The File Hash Calculator works with actual files you upload and can verify one result against one expected hash. This tool works purely with hash text you already have -- comparing two values, checking one against arbitrary text, or deduplicating a list -- no file involved.
Does comparing hashes here tell me if a file is safe?
It only tells you whether two values are identical (or which algorithm produced a given hash from given text) -- it says nothing about whether the file or data behind either hash is actually trustworthy.
Is anything I paste sent anywhere?
No. Every comparison, diff and hash computation happens entirely in your browser -- this tool has no server component.
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