Hash Identifier

Paste one or more hash strings to detect the likely algorithm - MD5, SHA-1, SHA-256, SHA-512, bcrypt, UUID, Base64, CRC32, and more.

Last reviewed: April 2026

Reviewed by Shannon Patterson, software engineer · last updated April 2026

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Hash Input

Identification Result

Algorithm	Length (hex chars)	Character Set	Status	Use Case
MD5	32	Hex (0-9, a-f)	Broken	Legacy checksums
MD4	32	Hex	Broken	NTLM base
NTLM	32	Hex	Weak	Windows auth
LM Hash	32	Hex (uppercase)	Broken	Legacy Windows
SHA-1	40	Hex	Deprecated	Legacy TLS, Git
RIPEMD-160	40	Hex	Deprecated	Bitcoin addresses
SHA-224	56	Hex	OK	Subset of SHA-2
SHA-256	64	Hex	Secure	TLS, JWT, checksums
SHA-384	96	Hex	Secure	TLS, high security
SHA-512	128	Hex	Secure	Passwords (fast), checksums
SHA3-256	64	Hex	Secure	Modern standard
SHA3-512	128	Hex	Secure	Modern standard
CRC32	8	Hex	Not crypto	Error detection
bcrypt	60 chars (mixed)	$2b$/$2a$ prefix	Recommended	Password storage
scrypt	Variable	$scrypt$ prefix	Recommended	Password storage
Argon2	Variable	$argon2 prefix	Recommended	Password storage
UUID v4	36 chars	Hex + hyphens	Standard	Unique identifiers
Base64	Multiple of 4	A-Z, a-z, 0-9, +, /, =	Encoding only	Data encoding

Paste a hash string above to identify its type.

How to Use the Hash Type Identifier

To use the Hash Type Identifier, simply paste one or more hash strings into the input field. The tool will analyze the hash length, character set, and prefix patterns to determine the likely algorithm. The results will show the algorithm name, confidence level (high/medium/low), and key details like bit length, hex character count, and security status.

When to Use the Tool in Real Workflows

The Hash Type Identifier is useful in various scenarios, such as verifying the integrity of downloaded files, checking the security of passwords, and identifying the type of a hash for forensic analysis.

How It Works

The Hash Type Identifier uses cryptographic hash functions to identify the type of a hash. It measures the length of the hash, checks the character set (hexadecimal, Base64, or mixed), and looks for distinctive prefixes like $2b$ for bcrypt or $argon2i for Argon2. The tool provides confidence levels for each match, indicating the likelihood of the algorithm being correct.

Tips, Edge Cases, or Limitations

Always ensure that the hash strings are correctly formatted and that you have the right permissions to analyze them. The tool is designed to be client-side, meaning it does not send any data to a server, ensuring privacy and security. For very large numbers of hashes, consider using batch mode to process them more efficiently.

Frequently Asked Questions

The tool identifies hash types by analyzing the length, character set, and prefix patterns of the hash. It uses cryptographic hash functions to determine the most likely algorithm.

MD5 produces a 32-character hex string, while SHA-256 produces a 64-character hex string. SHA-256 is considered more secure and is the standard choice for checksums and data integrity verification.

No, the tool cannot crack or decode a hash. It only identifies the type of hash based on its characteristics.

Multiple algorithms can share the same length and character set, leading to multiple possible types. Additional context is needed to determine the exact algorithm.

bcrypt is a password hash algorithm that uses a salt to enhance security. It is designed to be computationally expensive, making it difficult to crack. The prefix $2b$ or $2a$ indicates the use of bcrypt.