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InstantTools
Utilities · 100% browser-side

Hash Generator

Checksum a file or hash a string without it ever leaving your machine.

Free foreverNo uploadsNo account
Hashes are computed locally with the Web Crypto API — your text and files are never uploaded.
MD5—
SHA-1—
SHA-256—
SHA-384—
SHA-512—
MD5 and SHA-1 are shown for checksums and legacy compatibility — use SHA-256 or stronger for anything security-sensitive.
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01 · Real-world fits

Common use cases

  • Verifying a downloaded file against a published SHA-256 checksum
  • Generating cache keys or content fingerprints during development
  • Comparing two files quickly by their digests
  • Producing MD5 sums for legacy systems that still require them
  • Hashing strings while debugging webhook signatures
02 · The honest pitch

Why Hash Generator?

Hashing on a website usually means pasting your content into someone else's server. Here the SHA family runs on the browser's built-in Web Crypto API and MD5 runs as local JavaScript — the bytes never leave your device, which matters when the thing you're checksumming is a private build artifact or licensed download.

03 · Edge cases

Frequently asked questions

No. Files are read locally and hashed with the Web Crypto API in your browser. Nothing is transmitted.