Hash Generator
Generate cryptographic hashes from text or files • Verify download integrity • 100% client-side
Drag & drop a file here
or click to browse
What is a hash and why it matters
Digital Fingerprint
A hash is a unique fingerprint of data. Change even one character and the entire hash becomes completely different. This makes it perfect for detecting tampering.
Verify Downloads
Developers publish the SHA-256 hash of their software. After downloading, generate the hash of the file and compare. If they match, the file is authentic and unmodified.
One-Way Function
You can generate a hash from any data, but you cannot reverse a hash back to the original data. This is why hashes are used to store password fingerprints securely.
Which Algorithm?
SHA-256 is the current gold standard. SHA-1 and MD5 are considered broken for security purposes and should only be used for compatibility with legacy systems.
Common use cases
- Software downloads: Verify that a downloaded EXE, DMG, or ISO hasn't been tampered with
- Password storage: Developers store password hashes instead of plain passwords
- Blockchain & certificates: SHA-256 is the backbone of Bitcoin and TLS certificate signatures
- File deduplication: Compare file hashes to find duplicates without comparing contents
How this tool works
Everything runs entirely in your browser using the Web Crypto API (for SHA algorithms) and Spark-MD5 (for MD5). No text, no files, and no hashes are ever sent to a server. The tool works offline after the first page load.