Hash Generator

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Generate SHA-256, SHA-512 hashes

Developer Tools

How to Use Hash Generator

  1. 1Type or paste text in the input
  2. 2Select the hash algorithm
  3. 3Copy the generated hash

About Hash Generator

Hash Generator computes cryptographic hash digests from text input using the browser's native Web Crypto API. Supported algorithms include SHA-256, SHA-384, and SHA-512 — the industry-standard algorithms used for data integrity verification, password hashing derivation, digital signatures, and security audits.

A cryptographic hash function takes any input and produces a fixed-length string that uniquely represents that input. Even a single character change in the input produces a completely different hash — making hashes ideal for detecting file tampering, verifying download integrity, and storing passwords securely.

All hashing runs locally in your browser using the Web Crypto API. Your input data never leaves your device.

Key Features of Hash Generator

  • Generate SHA-256, SHA-384, and SHA-512 hashes from any text
  • Uses the browser's native Web Crypto API for secure, fast hashing
  • Output in lowercase hexadecimal format
  • Real-time hash update as you type
  • One-click copy of the hash output
  • Works entirely in-browser — input never leaves your device
  • Handles Unicode text including emoji and non-Latin characters
  • No file size limit for text input

Examples

Generate a SHA-256 hash to verify file integrity

Compute a hash of a known value to compare against a published checksum.

Input

Hello, World!

Output

SHA-256: dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986d

Demonstrate the avalanche effect

A tiny change produces a completely different hash.

Input

password1 vs password2

Output

Completely different 64-character SHA-256 hashes

Common Use Cases

  • Verifying the integrity of downloaded files by comparing their SHA-256 checksums
  • Generating deterministic identifiers from content for caching or deduplication
  • Checking whether a string matches a stored hash during security audits
  • Teaching cryptographic concepts by demonstrating the avalanche effect
  • Generating input for HMAC operations in API signature workflows
  • Producing file fingerprints to detect unauthorized modifications

Troubleshooting

Hash output differs from expected value

Solution

Hash functions are case-sensitive and whitespace-sensitive. Ensure there are no trailing spaces or newlines in your input.

MD5 or SHA-1 is not available

Solution

MD5 and SHA-1 are considered cryptographically broken and are intentionally not offered. Use SHA-256 or higher for all security-critical applications.

Hash of the same input keeps changing

Solution

Hash functions are deterministic — the same input always produces the same output. If hashes differ, there is a difference in input (encoding, whitespace, or newlines).

Frequently Asked Questions

Is MD5 supported?

MD5 is not supported because it is considered cryptographically broken. Use SHA-256 or higher for all security applications.

What is a cryptographic hash?

A cryptographic hash is a fixed-length string produced by a one-way mathematical function applied to any input. The same input always produces the same hash.

Can I use SHA-256 to store passwords?

Not directly. Raw SHA-256 is too fast, making brute-force attacks feasible. Use bcrypt, Argon2, or PBKDF2 which are intentionally slow and include salting.

What is the difference between SHA-256 and SHA-512?

SHA-256 produces a 256-bit (64 hex character) digest; SHA-512 produces a 512-bit (128 hex character) digest. SHA-256 is the most widely used.

Can two different inputs produce the same hash (collision)?

For SHA-256 and SHA-512 no practical collision has ever been found. Collisions are computationally infeasible with current technology.

Why does hashing the same text always give the same result?

Hash functions are deterministic algorithms — they always map the same input to the same output.

Is my data sent to a server?

No. Hashing is performed in your browser using the Web Crypto API. Your input text never leaves your device.

Can I hash a file instead of text?

The text input mode hashes text strings. File hashing may be added as a feature in a future update.