Hash Generator
概要 Hash Generator
Our free online Hash Generator computes MD5, SHA-1, SHA-256, and SHA-512 hashes of any text as you type - all four shown side by side for quick comparison.
MD5 and SHA-1 are useful for legacy compatibility and basic checksums but are considered cryptographically broken for security purposes; SHA-256 and SHA-512 are recommended for anything security-sensitive. All hashing happens locally in your browser using your browser's native Web Crypto API (plus a local MD5 implementation, since MD5 isn't part of that API) - nothing is ever sent to a server.
Who Uses This Tool
Developers use it to quickly generate a checksum for verifying file integrity or to compare test values against expected hash output in unit tests. System administrators use it to cross-check MD5 or SHA checksums published alongside a software download. Students learning about cryptographic hashing use it to see how even a one-character change in input completely changes the output hash. It is not a substitute for a proper password-hashing algorithm like bcrypt or Argon2 - MD5 and SHA-1 should never be used to store passwords, since both are broken against modern collision and cracking techniques, and even SHA-256/SHA-512 are unsalted general-purpose hashes rather than designed for password storage.
- Generates MD5, SHA-1, SHA-256, and SHA-512 hashes instantly
- Shows all four hash types side by side for easy comparison
- Computed locally via the browser's Web Crypto API for speed and privacy
- Clear guidance on which algorithms are safe for security-sensitive use
- Includes unlimited use with a RankWise Tools membership
Related Tools
Frequently asked questions
Which hash algorithm should I use?
For anything security-sensitive (checking file integrity from an untrusted source, generating tokens), use SHA-256 or SHA-512. MD5 and SHA-1 are both considered cryptographically broken and should only be used for legacy compatibility or non-security checksums.
Can these hashes be reversed back to my original text?
No - all four are one-way functions by design. Short or common inputs can sometimes be found via precomputed lookup tables ("rainbow tables"), but the algorithm itself cannot be reversed.
Is my text sent to a server?
No - all four hashes are computed entirely in your browser (MD5 via a local JavaScript implementation, the others via your browser's native Web Crypto API); nothing is uploaded.
