Hash Generator & Checksum Verifier (MD5, SHA-256)

Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes for text and files online. Free & private.

How It Works

  1. Choose «Text» or «File» mode.
  2. Enter your string or select a local file — hashes are calculated immediately.
  3. Paste an expected checksum into the compare box to verify file integrity with an instant green match indicator.

About Hash Generator & Checksum Verifier

Verifies file integrity against software releases, ISO disk images, and API signatures.

Calculations run locally using the browser Web Crypto API and pure JavaScript — files never upload to any server.

Frequently Asked Questions

Can a file hash be reversed back into the original file?

No. Cryptographic hash functions are one-way mathematical algorithms designed to be practically irreversible.

Are my files uploaded to generate the checksum?

No. Files are read locally by your browser in memory chunks. Nothing is uploaded or stored.

Which hash should I use for security verification?

SHA-256 and SHA-512 are industry-standard and recommended for secure integrity checks. MD5 and SHA-1 should only be used for legacy checksum comparisons.