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Subresource Integrity (SRI) Hash Generator

Generate SHA-256, SHA-384, and SHA-512 SRI hashes from exact asset bytes; it does not host the asset or configure your site.

Free to use

Script / Stylesheet Source

Result

Provide a URL, pasted content, or an uploaded file to generate its SRI hash.

How to Use

Subresource Integrity (SRI) lets a browser verify that a script or stylesheet loaded from a third-party host (a CDN, for example) hasn't been tampered with. You give the browser a cryptographic hash of the exact file you expect via the integrity attribute; if the CDN ever serves different bytes — because it was compromised, misconfigured, or a "silent update" changed the file underneath you — the browser refuses to execute or apply it, instead of silently running modified/malicious code in your users' browsers. Point this tool at a URL (fetched server-side), paste raw file content, or upload a file directly; it hashes the exact bytes with SHA-384 (plus SHA-256/SHA-512 for reference), base64-encodes the digest, and gives you ready-to-paste <script>/<link> snippets with integrity and crossorigin="anonymous" already filled in.

About Subresource Integrity (SRI) Hash Generator

Generate SHA-256, SHA-384, and SHA-512 SRI hashes from exact asset bytes; it does not host the asset or configure your site.

How to use this tool

  1. Enter the requested data or choose an upload.
  2. Check the file type and size limit before submitting.
  3. Review the result, then download or copy it.
  4. Keep the original and use the actions above to continue safely.

Read the full Subresource Integrity (SRI) Hash Generator guide →