Hash Identifier
Identify hash algorithms from hash strings
Hash Identifier is a free online tool from BrowserUtils that identify hash algorithms from hash strings. It runs entirely in your browser — your data never leaves your device. No account required.
Hash Input
Paste a hash above to identify its algorithm.
Supports MD5, SHA-1, SHA-256, SHA-384, SHA-512, bcrypt, Argon2, scrypt, CRC32, NTLM, and more.
How to use Hash Identifier
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About Hash Identifier
Free online hash identifier. Paste a hash string and identify the likely algorithm — MD5, SHA-1, SHA-256, SHA-512, bcrypt, argon2, and more. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
Hash Identifier specs
- Runtime
- 100% client-side (browser)
- Built on
- Web Crypto API (SubtleCrypto) for hashing and crypto.getRandomValues for secure randomness
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How does hash identification work?
The tool analyzes the hash length, character set, and format prefix to determine likely algorithms. For example, 32 hex characters suggests MD5, 64 hex characters suggests SHA-256, and $2b$ prefix indicates bcrypt.
Can it identify the exact algorithm?
Some hashes have unique prefixes (like bcrypt or argon2) that allow exact identification. For others like MD5 and NTLM that share the same length, the tool lists all possible matches with confidence levels.
What hash formats can be identified?
The tool recognizes MD5, SHA-1, SHA-256, SHA-512, bcrypt ($2a$, $2b$), argon2 ($argon2id$), NTLM, CRC32, and many other common hash formats.
Can I identify a hash from a database breach?
Yes, paste the hash and the tool will suggest the likely algorithm. This helps determine what hashing scheme was used, which is useful for security auditing and incident response.
Is the hash identifier safe for sensitive data?
Yes, the identification runs entirely in your browser by analyzing the format of the hash string. No data is sent to any server.
Why does the tool show multiple possible algorithms?
Some hash formats are ambiguous. For example, a 32-character hex string could be MD5, NTLM, or MD4 since they all produce 128-bit hashes. The tool lists all possibilities ranked by likelihood.
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