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Hash Generator (MD5, SHA-256, SHA-512)

Generate cryptographic hashes from text or files using MD5 (RFC 1321), SHA-1 (FIPS 180-1), SHA-256, and SHA-512 (FIPS 180-4). Uses the native Web Crypto API for SHA algorithms, ensuring secure computation without external dependencies. Hash functions produce fixed-size digests for data integrity verification, password storage (with salt), and digital signatures. All computation happens client-side.

Frequently Asked Questions

What is a hash function?
A cryptographic hash function converts input data of any size into a fixed-size output (digest). Key properties: deterministic (same input always yields same output), one-way (computationally infeasible to reverse), and collision-resistant (hard to find two inputs with the same output). MD5 produces 128-bit digests, SHA-1 produces 160-bit, SHA-256 produces 256-bit, and SHA-512 produces 512-bit outputs.
Which hash algorithm should I use?
For security-critical applications, use SHA-256 or SHA-512. MD5 (broken since 2004, Wang et al.) and SHA-1 (practical collision demonstrated by Google in 2017, SHAttered project) should only be used for non-security purposes like checksums or legacy system compatibility. SHA-256 is the standard for TLS certificates, Bitcoin mining, and most modern security protocols.
Can I hash files?
Yes, you can hash both text input and files. File hashing is done entirely in your browser using the Web Crypto API.

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How to Use

  1. 1 Enter text or upload a file in the input area.
  2. 2 Select one or more hash algorithms: MD5, SHA-1, SHA-256, or SHA-512.
  3. 3 Click **Generate** to compute the hash values using the Web Crypto API.
  4. 4 Copy individual hashes or compare them side by side.