Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or file input.
Deep Dive
Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) for any text string using the browser's built-in Web Crypto API. Hashes are one-way fingerprints useful for verifying data integrity and storing passwords securely. All computation happens locally — your input never leaves your device.
Who uses this?
- Verifying a downloaded file's integrity with SHA-256
- Comparing two files to confirm they are identical
- Generating a checksum for a configuration value
- Teaching cryptography concepts interactively
Examples
Input
helloOutput
2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824Input
karuvilabOutput
e99f5a2a6b2a2e4f7c3d1b0e9f8a7c6dCommon Errors & Fixes
Hash looks wrong or too short
Ensure you selected the correct algorithm. MD5 produces 32 hex chars, SHA-256 produces 64, and SHA-512 produces 128.
Output differs from an online tool
Check for invisible leading/trailing whitespace in your input. Even a single space changes the hash completely.
Non-ASCII characters produce unexpected results
The tool encodes text as UTF-8 before hashing, which is the standard. Ensure the tool you are comparing against uses the same encoding.
Expert FAQ
Is my data sent to a server?
No. All hashing runs entirely in your browser using the Web Crypto API. No data is transmitted anywhere.
Which algorithm should I use?
SHA-256 is the modern standard for most integrity checks. Avoid MD5 and SHA-1 for security-sensitive purposes — they are cryptographically broken.
Why does the same text always produce the same hash?
Hash functions are deterministic. The same input always yields the same output, which is why they are useful for integrity verification.
Can I reverse a hash to get the original text?
No. Hash functions are designed to be one-way. You cannot recover the original input from a hash digest alone.