Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes

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What is Hashing?

Hashing is the process of converting input data into a fixed-size string of characters using a mathematical function. The output (called a hash, digest, or checksum) is unique to the input data — even a tiny change in the input produces a completely different hash.

Hash functions are one-way: you can’t reverse a hash to recover the original input. This property makes them useful for password storage, data integrity verification, and digital signatures.

How to Use This Tool

  1. Enter or paste text into the input area
  2. Select the hash algorithm (MD5, SHA-1, SHA-256, SHA-512)
  3. View the hash in the output area — it updates in real-time
  4. Copy the hash value

Hash Algorithm Comparison

AlgorithmOutput SizeSecurityUse Cases
MD5128 bits (32 hex)BrokenChecksums, non-security
SHA-1160 bits (40 hex)WeakLegacy systems
SHA-256256 bits (64 hex)StrongSecurity, blockchain
SHA-512512 bits (128 hex)StrongHigh-security applications

Common Use Cases

  • File integrity: Verify downloaded files match the original using checksums
  • Password storage: Store hashed passwords instead of plain text
  • Digital signatures: Verify authenticity and integrity of documents
  • Blockchain: SHA-256 is the backbone of Bitcoin’s proof-of-work
  • Deduplication: Identify duplicate files by comparing hashes

Frequently Asked Questions

What is a hash function?

A hash function is a mathematical algorithm that converts input data of any size into a fixed-size output (the hash or digest). Hash functions are one-way — you can't reverse the hash to recover the original input.

What is MD5?

MD5 (Message Digest Algorithm 5) produces a 128-bit (32-character hex) hash. While widely used for checksums, MD5 is considered cryptographically broken and shouldn't be used for security purposes.

What is SHA-256?

SHA-256 (Secure Hash Algorithm 256-bit) is part of the SHA-2 family. It produces a 256-bit (64-character hex) hash and is widely used in security applications, blockchain technology, and digital signatures.

What is the difference between MD5 and SHA-256?

MD5 produces a 128-bit hash and is faster but vulnerable to collision attacks. SHA-256 produces a 256-bit hash, is more secure, and is recommended for all security-sensitive applications. MD5 is still acceptable for checksums and non-security uses.

Is my data safe?

Yes. All hashing happens entirely in your browser using the Web Crypto API. Your data is never sent to any server.