Hash Generator - Free Online Tool | PivaBox

Compute SHA-1, SHA-256, SHA-384, SHA-512 hashes using browser Crypto API

Hash Generator — Generate SHA-256, SHA-512, MD5, SHA-1, SHA-384 Hashes Online

  1. Type or paste the text you want to hash, or upload a file. The hash generator supports both text input and file hashing — your file is read locally and never uploaded.
  2. Select your hash algorithm: SHA-256 (most commonly used for security), SHA-512 (stronger, 512-bit output), SHA-1 (legacy, not recommended for security), SHA-384, or MD5 (fast but cryptographically broken — use only for checksums). All hashes are computed instantly using the Web Crypto API.
  3. Copy the resulting hash string. Hashes are displayed in hexadecimal format. Use them for file integrity verification, password storage (with salt), data deduplication, or blockchain/cryptographic applications.

Frequently Asked Questions

Is the Hash Generator free?

Yes, completely free. Generate unlimited hashes with no restrictions on input size — hash files of any size, from small text snippets to multi-gigabyte files.

Are my data or files uploaded anywhere?

No. All hashing is computed locally using your browser's built-in Web Crypto API (SubtleCrypto). Your text, passwords, and files never leave your device — critical for security-sensitive data.

Which hash algorithm should I choose and what are they used for?

SHA-256 is the gold standard — use it for password hashing (with a unique salt and multiple iterations via PBKDF2/bcrypt), digital signatures, blockchain (Bitcoin uses double SHA-256), and file integrity checks. SHA-512 offers even stronger security with a 512-bit digest but is slower — ideal for high-security environments. SHA-384 is a truncated SHA-512 variant used in some government applications. MD5 and SHA-1 are cryptographically broken (collision attacks are practical) — do NOT use them for security purposes. MD5 is still useful for non-security checksums (verifying file downloads aren't corrupted) and content-based deduplication. Important: plain hashing is NOT sufficient for password storage — always use a dedicated password hashing function like bcrypt, scrypt, or Argon2 with proper salting and multiple iterations. Check our bcrypt and scrypt tools for secure password hashing.