Hash Generator

How to use

Type or paste text into the input box. MD5, SHA-1, SHA-256, and SHA-512 hashes are all computed simultaneously and appear instantly. Toggle 'Uppercase' to switch between lowercase hex and uppercase hex output. Click Copy next to any hash to copy that specific hash to clipboard. The tool updates the hash in real time as you type — no button click needed. All hashing runs locally using the browser's built-in Web Crypto API combined with a local MD5 implementation.

Why use this tool

Hash functions are fundamental to software security and data integrity. Use this tool to verify that a downloaded file has not been tampered with (compare the computed hash with the publisher's checksum), to explore the behavior of different hash algorithms, or to quickly generate hashes for testing and debugging. The local processing ensures your sensitive data never leaves your browser — particularly important when hashing passwords or API secrets during development.

FAQ

Is MD5 secure for passwords?

No. MD5 is cryptographically broken and unsuitable for password hashing. Use bcrypt or Argon2 instead. MD5 is still useful for checksums and file integrity.

Which algorithm should I use?

SHA-256 or SHA-512 for general security. SHA-1 is deprecated. MD5 is only for non-security checksums.

Is my text sent to a server?

No. Hashing uses the browser's built-in Web Crypto API and a local MD5 implementation. Nothing is transmitted.

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

Theoretically yes, but practically no for SHA-256 and SHA-512. MD5 and SHA-1 have known collision attacks and should not be used for security. SHA-256 has no known collisions and is considered collision-resistant for the foreseeable future.

What is SHA-256 commonly used for?

SHA-256 is used for: verifying file downloads (checksums), Bitcoin mining (proof of work), HMAC signatures in APIs, certificate fingerprints in HTTPS/TLS, and Git commit hashes. It is the most widely deployed hash function in the world.